Apparently, the maximum amount of desired latency for voip is about 100 milliseconds.
With SipAgent, the settings for Play and Record buffer are:
-1
640
960. . . and so on; the settings go above 6000.
This can't be in milliseconds, can it?
Record buffer allots time encoding and packetizing, which increases the quality heard by the callee?
Play buffer allots time for decoding the callee, which affects quality heard by the caller?
So, if I want the people I call to hear the highest possible quality, I increase the record buffer, while keeping the play buffer at -1 to reduce overall latency?
During one call, someone said I sounded like I was under water, and many times people say "hello? hello?" during the call while I'm talking, even when the buffers are set to -1.
Also, call quality has been said to be better on froyo, but the developer thinks there is a problem with sipagent using too much battery on froyo.
this should be in the app forum.
Related
Does the new FW improve the quality of sound when recording video?
As I posted long time ago and never get any solution - the sound of the video is always strangely deformed,
WHILE when recording a sound note - it's fine!!!
Is it dependend on any setting OR the fact of storing video on memory card directly?
I actually never had this problem. What ROM are you using? I don't think it's caused by storing it on the storage card.. I mean, how the hell would that alter sound quality?
Try messing about with the settings a bit and also check what apps you installed, perhaps some codec got messed up a bit?
Haven't tested it, but, I would imagine that the bitrate used when recording video (128 kbps ?) is far inferior to the bitrate used while just recording audio only (>1000 kbps ?). Bitrate alone makes a big difference in sound quality.
Hmm
I havn't used it on older ROMs but hae taken quite a few vids of a robot I have been building over hte last few days and it has been fine, although the sound was mostly of myself and my team laughing and shouting, even the very loud sounds didn't clip or anything.
alias
Thanks for reply.
Hi All,
Not sure if this is the right forum so please move if not...
I am trying to write a voice changer for android and I'm running in to some design decisions which I need a little help with.
I am using AudioRecord to get PCM audio from the mic, I need to record audio until the audio is below a certain level, I am then going to perform some processing on it and play it back. So I am unsure how long the audio is going to last for.
Since I want the delay between recording and playback to be as small as possible, I am unsure whether to keep the buffer in memory or to write it to the SD card and process it from there.
How much of a delay would using files induce when I am doing a lot of processing on the signal?
I am sampling at 8000 Hz so presumably 1s of audio would take up 1.6K of memory, what's the practical limit on the amount of memory I can use within the app?
Thanks
I love the camcorder's video quality (H264 1280*720 at a true 30fps with bitrate around 12Mbps), but the audio quality leaves much to be desired: 64~Kbps AAC at a whopping 16KHz in mono. This makes any videos I record in somewhat loud settings to have a very garbled audio track, and it makes the Vibrant a useless camcorder at concerts.
Does anyone know if this is a hardware limitation? Maybe there's some hacky way to change it.
Is there any fix for this issue nowadays??
Load a kernel with Voodoo Sound. This will greatly improve the audio playback and recording. With the Voodoo control app, you can even choose from recording profiles for specific situations (normal, high sensitivity, loud environment).
I tried to video record my son while he was speaking but at playback I could hardly hear his voice. He was about 1 meter apart and I could hear him as if he was 20m away. My voice sounded ok though. I assume that the microphone used for audio recording is the same as the phone mic with higher volume control.
Is everyone experiencing the same?
Also, Ihaven't found any controls to configure audio levels for different circumstances (i.e. phone ringer, speakerphone, speaker during conversation, etc.) Is it necessary to only configure volume when you are in that area (i.e only during conversation or during playback) and not all at once in a special control panel? (I hope you understand the last part as I don't know how to explain better)
I also feel that the playback volume for recorded video is too low (even on max volume). The audio quality is also not as good as I would hope. I have yet to test playback on a PC though.
Unfortunately anything related to Desire HD sound is low at the bottom line no matter recording or speaker it is.
agreed that recording volume is too low. But one thing i did find is that when you hold your phone to record, the natural position where your right hand holds the phone actually covers the microphone (well at least for me). So make sure your hand isnt covering that and it might improve sound a little.
But when i playback a recording on my laptop it sounds ok when i max the volume.. definitely audible.
Im also getting this low mic problem, made sure i was not covering mic, still low volume. Even took the case off, still no joy, cant believe they did not test this before launch
Please HTC sort this out
After playing back recorded videos on my laptop, i'd agree with SupremeBeaver that the volume is ok. The sound quality seems much better too, so i'm not too fussed now
Is there any way to turn the transformer up? Volume is up all the way but it's probably about 1/3 the volume of my iPad 2. Might this be a build issue specific to my device (not talking about balance, though maybe the output isn't balanced well and so one side is underworking)
Is there any way to increase the quality of the video on the YouTube app? Is set to hq in the video, and I enabled the high quality on mobile devices on the preferences...but it's still poor quality. Which format is being used to provide video from YouTube?
Thanks for the help...really trying to give this a solid chance before giving up.