I am a newbie to Linux Sound Programming, so few of my queries may sound
foolish, but kindly address them.<br><br><b>I want to capture a video
on my beagle board Xm rev C (TI DM3730). </b>So as per as the audio
capturing is concerned, I am very much confused about the audio formats,
like which format should I choose to get a better sound quality in the
least possible memory requirement.<br>
<br>Since so many PCM formats such as S8, U8, S16_LE, U16_LE, A-law,
u-law-, IMA_ADPCM, MPEG, GSM, etc are there so which format should I opt
for.<br><br>Also<br><ol><li> What is difference between signed and
unsigned PCM format, how does it can affect the sound quality.</li><li>If I go for MPEG format, does it mean that audio compression would
handled at my audio port level and my DSP processor would not come into
picture.</li><li>In reference to my above query i.e. 2, if audio
compression is handled at audio port level, so at the time of
audio/video sync up, how would be my processor be able to time sync both
audio and video, since audio is not being compressed by the DSP.</li><li>If I opt for A-law or u-law, what could be benefits/disadvantages of
using these formats. Would the audio sample be in compressed form in
this case, if yes, how would audio/video sync up will happen in this
case.<br></li></ol><br>If possible kindly provide me a link where I can find
differences between these various formats, pros and cons of each of
them.<br><br>Thanks & Regards<br>Harman Kalra<br>