Database Users

What Dolby Mobile REALLY does!

Hey guys! I've found out what Dolby Mobile is really good at doing. So basically I have a Logitech X540 5.1 Surroud Sound System. As you may know, any 5.1 Surround System usually has 3 wires for input:
1)For Front Left and Right Speakers
2)For Center Speaker/Subwoofer
3)For Rear Left and Right Speakers
Of course, you can use the main (green) wire for Left and Right sound. Many Surround Sound Systems feature what is known as "Matrix Mode", where you press a button and the incoming audio from a device that has only Stereo Audio (Which in our is the Desire HD) is converted into 5.1 Channel Sound! But as those of you who've tried may know, it's not that great ¬_¬
Anyways, I don't really use my computer for JUST playing music, as it heats the whole room up in under 15 minutes
So I plug my Desire HD into my Surround Sound Sytem for music since it's a GOOD music player!
So anyways, when you use headphones, and select Dolby, the sound seems a little too "Seperated" and "Wide" and Bassy right? That's what they include SRS for, listening to music through headphones. Now, what is Dolby Mobile for, you may ask? Simple! When you use Matrix mode, it converts 2 Channel Sound so that audio is output through ALL speakers. Generally speaking, it works OK...
Try this! Plug in your Desire HD, don't put on Dolby Mobile just yet and select Matrix Mode on your sound system, or a similar feature. Listen to how it sounds. Now, try the same with SRS! Sounds better, but more bass. Now, try Dolby Mobile! Sound comes through all 5 speakers LOUD and CRYSTAL CLEAR. What Dolby Mobile does is it encodes music as it is playing so that it can be recieved by a Surround System with Matrix, and thus spreads the sound out, so different instruments etc go to different speakers. Creates a really nice Surround Sound System audio from "just" a mobile phone! Try it out, and tell me guys if you notice the difference as much as I did! Oh, and turn the bass and volume up a bit while you're at it

Will definitely try it out... Thats a Plus

Speakers
Wow! I bet that took a while to figure out.
I'll definitely try it out.
This just got me wondering.... if HTC did such a good job at at making the music app on the DHD so good , why.... Seriously why did they did they fall so miserably short of including decent speakers on the phone itself? Even the earphones included in the box can be used better as a shoelace.

This sounds interesting.. So you say that i will need to change some settings on my reciever also?

I bought DHD mainly for this reason when it was released. I have dolby in all my pcs, laptops and now in mobile. And for this reason am still neglecting in switching over to sense 3 ROM.

Or you could go to the Dolby website and actually read the data sheets about dolby mobile.
http://www.dolby.com/DocLibTechLanding.aspx?taxid=1488

ViousAD said:
Wow! I bet that took a while to figure out.
I'll definitely try it out.
This just got me wondering.... if HTC did such a good job at at making the music app on the DHD so good , why.... Seriously why did they did they fall so miserably short of including decent speakers on the phone itself? Even the earphones included in the box can be used better as a shoelace.
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The speakers aren't really that bad, it's just the defaults that HTC have set the output to that's crap. Look for a thread in the General section called 'actually make your speaker sound good', it shows you how to manually tweak the DSP settings. I found after playing around with it for a while, I could actually get my DHD sounding quite meaty.

How do you connect your DHD to your speakers?
I have gigaworks and would love to see how my DHD sounded on these.
Cheers.

{LCD}Stelios said:
How do you connect your DHD to your speakers?
I have gigaworks and would love to see how my DHD sounded on these.
Cheers.
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Click to collapse
Connect the audio input wire that goes into your pc, to your Desire HD's headphone jack instead

giusdk said:
This sounds interesting.. So you say that i will need to change some settings on my reciever also?
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Click to collapse
You may have to, or you might not. For my speakers I had to enable Matrix Mode. I'm certain all the good sound systems have that facility, or a feature similar to that.

Found out how to make the sound from your sound systems sound even better! Download PowerAmp, and select the Dolby Mobile option within Poweramp. Also you can change the equalizer and other settings so you can fine tune the sound

Elemental_Fire said:
Found out how to make the sound from your sound systems sound even better! Download PowerAmp, and select the Dolby Mobile option within Poweramp. Also you can change the equalizer and other settings so you can fine tune the sound
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Click to collapse
Worked well. Thanks

Elemental_Fire said:
Connect the audio input wire that goes into your pc, to your Desire HD's headphone jack instead
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Click to collapse
I have three that go into the back of my sound card?

{LCD}Stelios said:
I have three that go into the back of my sound card?
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Which colour is each one? The primary one is the green one

Where to start - new Joying Android Head Unit issues

Hi,
I've just installed a new Joying Android Head Unit and I'm pretty disappointed by the sound quality - in fact it's awful - on radio and playing very high quality mp3s - I know it's not the car speakers because they sounded great on the old system.
So I came here wondering if there is anything I can do about it?
I've installed PowerAmp app and tweaked the equalizer, however the sound always sounds tinny - especially noticeable on the base.
At the moment I'm only getting sound from the front speakers which could be a wiring issue..
Looking around I notice there is a soldering solution to fixing the radio sound - is this a general fix for sound output? Anyone tried it?
Finally, would fitting an external amp improve things, or would the signal from the Joying unit still be too poor?

Yeah I completed 7floor's sound mode on mine. It helped with the squashed sound and tinny-ness now the sound is better, not that of a brand name head unit, but better.

welcome to the world of chinese android HUs. Add an external DSP and external amp. That would give you the most noticeable boost. Find a good deal on a used amp from your local craigslist, and for DSP, check out the minidsp 2x4. It's roughly $100 and is fantastic.

Can anyone explain the difference between DSP and Amp, and how this links in with the HU?
I get that the HU has the audio controlled by the Sound Processor IC which is controlled by the MCU - and the point of the mod is to control it via Android.
Does the DSP replace the processing of the Sound processor with/without the MCU, or does it process sound afterwards?
The Amp presumably comes last and only serves to boost the power of the provided signal.
I'm happy to buy a decent dsp and amp, as I think the android unit is fab apart from the sound quality, if the quality I can eventually produce rivals that of a reasonable audio system.
Sorry, but I'm somewhat of a noob when it comes to car audio systems.

dsp -
https://www.minidsp.com/products/minidsp-in-a-box/minidsp-2x4
lets you set electronic cross-overs, equalization, and time alignment. Effectively a super advanced sound processor that overrides the HU sound processing. So what you do is set the HU EQ to flat, so that it's not doing any sound processing to the signal, and let the DSP do the work. the minidsp even has tools that let you auto-eq the system using an app called REW. Similar to how home audio receivers have tools like accueq etc.
an amp is exactly what you say. It becomes essential if you swap out the stock speakers for nicer ones that require more power. They accept low level RCA inputs, as does the DSP, so if you plan to add a DSP you may as well add an amp.
This becomes quite a bit of work to set up, as it's a lot of laborious wiring. But if you want the best sound out of these things, it's the way to go. I hated the stock audio system in my car, so for me it was a no-brainer. I'm on a quest to squeeze the best sound I can out of my unit, and while I'm still not quite there, it's miles better than where it started.

Hisma said:
dsp -
https://www.minidsp.com/products/minidsp-in-a-box/minidsp-2x4
lets you set electronic cross-overs, equalization, and time alignment. Effectively a super advanced sound processor that overrides the HU sound processing. So what you do is set the HU EQ to flat, so that it's not doing any sound processing to the signal, and let the DSP do the work. the minidsp even has tools that let you auto-eq the system using an app called REW. Similar to how home audio receivers have tools like accueq etc.
an amp is exactly what you say. It becomes essential if you swap out the stock speakers for nicer ones that require more power. They accept low level RCA inputs, as does the DSP, so if you plan to add a DSP you may as well add an amp.
This becomes quite a bit of work to set up, as it's a lot of laborious wiring. But if you want the best sound out of these things, it's the way to go. I hated the stock audio system in my car, so for me it was a no-brainer. I'm on a quest to squeeze the best sound I can out of my unit, and while I'm still not quite there, it's miles better than where it started.
Click to expand...
Click to collapse
Did you ever use the mini dsp and if so how was the quality with Android being the source? Did you do the 7floors sound bypass mod as well or is there a better method now? I have 2 amps, 1 mono 1 4channel and would like better control and quality on my rk3188. Thanks

joying phone bluetooth only on one speaker

Called joying and they told me the audio for the phone bluetooth connection only will come out of the front left speaker on all their units, can anyone confirm this? In my vw the sound while on a phone call comes out of all the speakers. Any car i have ever been in the sound comes out all speakers while on a call, not sure why on these it only comes out one channel if its true.
Thanks to anyone to confirm this.

On mine it comes out the passenger side. I know my Kenwood would allow me to select. I've gotten used to it so it's really no big deal
Sent from my SM-N910P using Tapatalk

madcowintucson said:
Called joying and they told me the audio for the phone bluetooth connection only will come out of the front left speaker on all their units, can anyone confirm this? In my vw the sound while on a phone call comes out of all the speakers. Any car i have ever been in the sound comes out all speakers while on a call, not sure why on these it only comes out one channel if its true.
Thanks to anyone to confirm this.
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Click to collapse
Yup mine does the same thing and it really sounds bad. It comes out of the passenger side and middle dash speaker, but mostly just the tweeters....At highway speed I cant hear half the call.....I am hoping to find a way around this.

Oh wow OK. I had an idea u had a spare Bluetooth speaker laying around and I can use that in the car but it basically defeats controlling the audio from the dash. This blows my mind how bad the audio is in these. Now is that speaker out or rca out on yours?

madcowintucson said:
Oh wow OK. I had an idea u had a spare Bluetooth speaker laying around and I can use that in the car but it basically defeats controlling the audio from the dash. This blows my mind how bad the audio is in these. Now is that speaker out or rca out on yours?
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No, my current set up is still using the factory wiring harness. I havent had a chance to get my amps and trunk all set up for the RCA outs yet. I am hoping someone smarter than me can figure out a way to change the phone audio output settings.....

I am pretty sure it could be done with alsa mixer but I have no clue how to use it to route audio in Android it's very complicated and zero instructions.

madcowintucson said:
I am pretty sure it could be done with alsa mixer but I have no clue how to use it to route audio in Android it's very complicated and zero instructions.
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Click to collapse
It really is a shame. The phone app is just sad all the way around on this unit. Not having a Favorites list is a another big downer.....and I dont know if yours does it at all, but when I am on a phone call I cannot access anything until the call is ended. Everything gets grayed out even when I minimize the call option on the bottom of the screen....I am pretty sure that is just a bug in the software that will get fixed in an update

I don't have a unit yet myself but at this rate it may be only good for controlling the phone but for that matter I can get a separate controller for that.

On my Joying it does this as well, all of the audio comes out of the front passenger speaker. However it doesn't sound bad. It gets very loud, and I can make and receive phone calls fine. The sound is mono as opposed to stereo, and that does sound weird, but I have no issue hearing calls.
Can people with a non-Joying unit chime in? does it do the same one speaker thing? or is that Joying specific?

In the old days this was common practice so as the speakers didn't cause feedback with the microphone which was most commonly mounted atop the drivers pillar. So the opposite speaker was used for audio

I have a Funrover head unit since almost a week and I have the same issue, sound is coming only from front speakers which make the call over bluetooth just a hell for me.
I barely can hear the caller specially while driving
this is a nightmare !!!

Sofia units use both front speakers.
All PX5, no matter Joying or other units, only use one front speaker

surfer63 said:
Sofia units use both front speakers.
All PX5, no matter Joying or other units, only use one front speaker
Click to expand...
Click to collapse
Ok thanks, but that being said, is there a way to remediate to this ?

namek09 said:
Ok thanks, but that being said, is there a way to remediate to this ?
Click to expand...
Click to collapse
I don't know. It is already going back to the PX3 models. Loads of topics written about it in the mtcb/d forums. It is best to search there.
phone audio is mono anyway, so I guess they just route it to one of the boxes.

Frequency variations

So I've had higher end pioneer, alpines, Kenwood's etc. I just bought an obscure android unit because 1 it was cheap and two it mirrors flawlessly. Here's my question... Across all of these platforms whenever I adjust the frequencies either in the phone os or (now) on the head unit when one, say low 60hz or lower goes up I lose volume on the other end of the spectrum. This has been steady across everything, phone's too LG's, Samsung, HTC 10 my current phone. Also they have all been both rooted and stock, it's becoming infuriating. Is this just a limitation in the hardware not normally noticed or simply overlooked by manufacturers because most people im assuming dont listen at loud volumes over these specific frequencies, ie earbuds and such. Or have I been consistently messing something up? I've tried at least 100 different apps. rooted aftermarket sound mods, bluetooth,aux input. All with the same result. And the tracks aren't necessarily the issue either because I've gone in and re-amatured (sorry) those as well. I searched and searched many a waiting in the car for the wife and found nothing. But I think the search engines hate me. Any input would be appreciated.

I've found the same thing with a lot of EQ's available via the play store.
However, I'd highly recommend a mod that's been around forever called Viper4Android - it does NOT act like those EQ apps you get from the app store, where increasing the bass actually just lowers the mids and treble. Without Viper4Android on my MTCE PX5 head-unit, I would not be happy with the sound quality. With Viper4Android, the unit sounds better than any other headunit I've owned (although, I am using an external amp as well). But even with the internal amp, Viper4Android brings the sound quality to new levels.
I've tried all of the sound-patch MCUs and none of them make anywhere near the difference that Viper4Android does. It has a "real" EQ (10-band) as well as lots of other very cool (and useful) functions.
Some people will tell you that you should leave the EQ on your radio "flat" becuase that is "how the music is supposed to sound", but that is absolutely false. That may be true *if* your car was a recording studio, where everything is optimal for sound-quality, but a car is about the furthest thing from a recording studio. A car radio with a "flat" EQ sounds absolutely nothing like the artist intended because the car environment is an absolutely horrible place for good sound-quality. Viper4Android allows you to correct the issues caused by the car environment *and* tweak the sound to your specific liking.
When it comes to sound-quality, all that *really* matters is what *you* think of the sound (not what someone else tells you it should sound like) - and Viper4Android is the best tool I've found to make the music sound good to *you*.
Just my opinion, of course.

Had it
jtrosky said:
I've found the same thing with a lot of EQ's available via the play store.
However, I'd highly recommend a mod that's been around forever called Viper4Android - it does NOT act like those EQ apps you get from the app store, where increasing the bass actually just lowers the mids and treble. Without Viper4Android on my MTCE PX5 head-unit, I would not be happy with the sound quality. With Viper4Android, the unit sounds better than any other headunit I've owned (although, I am using an external amp as well). But even with the internal amp, Viper4Android brings the sound quality to new levels.
I've tried all of the sound-patch MCUs and none of them make anywhere near the difference that Viper4Android does. It has a "real" EQ (10-band) as well as lots of other very cool (and useful) functions.
Some people will tell you that you should leave the EQ on your radio "flat" becuase that is "how the music is supposed to sound", but that is absolutely false. That may be true *if* your car was a recording studio, where everything is optimal for sound-quality, but a car is about the furthest thing from a recording studio. A car radio with a "flat" EQ sounds absolutely nothing like the artist intended because the car environment is an absolutely horrible place for good sound-quality. Viper4Android allows you to correct the issues caused by the car environment *and* tweak the sound to your specific liking.
When it comes to sound-quality, all that *really* matters is what *you* think of the sound (not what someone else tells you it should sound like) - and Viper4Android is the best tool I've found to make the music sound good to *you*.
Just my opinion, of course.
Click to expand...
Click to collapse
Had V4A on my stylo 2+ and didn't sound bad but,and again I was probably using something incorrectly but same deal raise the high end and signal to my subs would fade out and vice-versa. I was hoping it wasn't a hardware limitation but it really seems that way. Best idea I've found it phone and headunit slightly adjusted to define the signals then an active preamp equalizer / crossover to split said freq and supply some of missing wattage from the poor audio chips at least in the Android HU's. But thanks for the input. :good:

I'm sure that not all Android head-units are created equal, but I can say with absolute certainty that with Viper4Android on my Eonon-branded MTCE-WWW Android 8 head-unit, I am definitely not losing low end when I increase the high-end (or vice-versa). In fact, I get the best bass that I've ever had in a head-unit and I'm actually having to go out of my way to sound-deaden and "tighten up" the car interior in order to handle the bass without vibration-related sounds coming from the inteior parts at higher volume levels! The sound is incredible - even from on-line streaming sources such as Pandora and Spotify (I have mine setup to automatically use separate V4A profiles for each music app via Tasker).
However, I do have a small extenral 45Wx4 RMS Kicker KEY180.4 auto-tuning DSP amp and a small Pioneer TS-WH500A under-the-seat subwoofer. Between the EQ and the Convolver in V4A (I personally like the BBE5 convolver .irs file), this thing sounds incredible. I was really concerned about sound-quality with this Android head-unit, but that turned out to be a non-issue with V4A (probably would have been an issue without it).
But even with the stock amp, it sounded really good with V4A (not quite powerful enough for me though). The Kicker KEY180.4 auto-tuning DSP amp definitely helps though. Love that amp. It has a higher noise floor than I'd like, but it sounds fantastic (I originally had an Alpine KTP-445U 45Wx4 RMS amp and the Kicker sounds *so* much better).
I would defintiely give V4A a try if you are looking for better sound quality. I feel that car steroes can benefit from 4VA even more than phones.

yt9213aj unit cuts off the car stock radio

Hi,
i recently recieved this unit (supposedly running 10.1 w. 9-inch screen, 1GB/16GB, but from other threads here i assume that this would not be quite true (Android version....)). Anyhow, after installing it in my car, i noticed that the stock car radio ceased to work and i wonder if it would be possible to get sound working from it again, even if this Android head-unit is connected?

No one has this problem? at all?
Sure, i have the radio of this Android unit working, but i'm just trying to understand why it would cut off the stock radio?

my03 said:
No one has this problem? at all?
Sure, i have the radio of this Android unit working, but i'm just trying to understand why it would cut off the stock radio?
Click to expand...
Click to collapse
I'm having the same problem did you manage to find a solution to the problem

yes and no. On my unit, there is this L+R "aux in" connectors hanging out of the main harness (that comes out of the Android unit) and the sellers (after 5 roundtrips of mails, videos of me explaining the issue, etc) told me to connect those two to the "aux-out". I believe they meant the aux-out on my car stereo (nothing such exists on the Kenwood unit that the car came with). What i DID try was to connect the audio-out (that also comes out of the Android head unit) to the aux-in and then i actually got sound from my car CD/Radio. Problem with that was that it now came out mixed together with the audio from the Android unit.
To make matters worse, as soon as i exited the Android unit radio app, the sound from my CD stopped playing as well (so muted). Only if i had either my radio on (android) or if i played something from USB (mp3) the sound came through.
The seller then told me to launch the AVIN app as that would be the only way to make it work, which it did not. To top it all off, having it connected like this (even if i dropped the volume on the Android unit to 0) was causing this constant "hum" in my speakers so it was not practical at all.
So no, it was never solved and imho it never will be solved (unless possibly if you have some aux-out connectors available?)

Thanks for reply I was thinking along the same lines myself which is good, as my car has an aux in so I was going to see if I could find aux out and connect it, I will have a good try this week and keep you updated, which vehicle is your unit installed in by the way

Hi Mercedes-w204, i have a Subaru Legacy 2005 with a Kenwood (gx-201-LHF2) radio/CD unit (without aux)
I got in touch with the sellers and now they are telling me that a filter might help sorting out the issue, lets see where it all ends up

In general, these units are replacing stock audio altogether. It's not recommended to keep stock stereos period.

I would tend to agree with you, but the issue i have is that the stock radio is rock solid where this one leaves certain things to desire (it sometimes has static, mutes occationally, etc). Also, i would like to keep the CD available and basically use it for maps/nav, USB audio and BT (prefferably routed through the stock stereo).

my03 said:
I would tend to agree with you, but the issue i have is that the stock radio is rock solid where this one leaves certain things to desire (it sometimes has static, mutes occationally, etc). Also, i would like to keep the CD available and basically use it for maps/nav, USB audio and BT (prefferably routed through the stock stereo).
Click to expand...
Click to collapse
Wouldn't it be easier to just use your Android phone then? But I see what you mean and fully agree with you, which is why I heavily mod these units - hardware and software alike.
You can improve the radio quality considerably, nearly to DAB level. The sound can also be improved to very hi-end output levels. Frankly, enough things can be improved in these units at a very low cost (provided you have the equipment and intermediate soldering skills). T give you an example, this is what I know is possible to achieve with these units:
Enhance sound to HIFI quality
Improve radio to close to DAB output quality
Improve wifi speed 10-20x times
Improve microphone by up to 5 times
Enhance the speed of the operating system by 50%
Reduced overheating by up to 200%
Stabilize the Android OS while adding endless tweaking options for UI, sound, and other functions

Wow. Yeah it would be needed imho as those areas (that you describe) could be improved. Anywhere where mods like these are described?

iceblue1980 said:
Wouldn't it be easier to just use your Android phone then? But I see what you mean and fully agree with you, which is why I heavily mod these units - hardware and software alike.
You can improve the radio quality considerably, nearly to DAB level. The sound can also be improved to very hi-end output levels. Frankly, enough things can be improved in these units at a very low cost (provided you have the equipment and intermediate soldering skills). T give you an example, this is what I know is possible to achieve with these units:
Enhance sound to HIFI quality
Improve radio to close to DAB output quality
Improve wifi speed 10-20x times
Improve microphone by up to 5 times
Enhance the speed of the operating system by 50%
Reduced overheating by up to 200%
Stabilize the Android OS while adding endless tweaking options for UI, sound, and other functions
Click to expand...
Click to collapse
Consider posting "how tos" - if the results are as good as the claims.

marchnz said:
Consider posting "how tos" - if the results are as good as the claims.
Click to expand...
Click to collapse
The instructions are available here and on 4PDA forums, to name a few. It would take me an insanely long time to put everything here. I have a daytime job and a family so, unfortunately, no time to do what you asked. I might add some How-To videos to my Youtube channel later on.