Just wanted to mention that I was able to do this yesterday <grin>. I had to find all the mixer groups. Their params told me that only Mic-In was being captured, both channels. If I started capturing both channels of Line-In, I could not capture Mic-In at all as mentioned by clemens. But to my delight I could capture left channel of Line-In and right channel of Mic-In by configuring the appropriate Mixer group structure's 'capture' element properly and send it to the mixer and it came out Line-out on the required channels respectively.
Now I am off to my next step: trying to separate the left and right channel data from a buffer that I have captured/read. If you have not figured out already, I am trying to use an echo cancellor and after I separate out this left and right channels I would feed it to the echo-can software. Any idea how the captured buffer stores the different channels that I need to extract? Thanks in advance. Clemens Ladisch <[EMAIL PROTECTED]> wrote: > Nikhil Deo wrote: > > It is to be done on QNX > > By now, QNX's API is completely different. > > > I need to capture input from the mic AND the line in. > > This will work only if your hardware supports this. Many sound cards > can select exactly one input for recording. > > > Then I need to output the mic input on the Right-LineOut and > > leftLineIn on leftLineOut. (right line in can be ignored) > > This is easy once you have captured the data. > > > Another possibility would be to configure the mixer to route the > inputs as you want them. Again, this is dependent on the capabilities > of your hardware/drivers. > > > in 2, my mixer group was input gain and although it seemed to be recording > > something, I could not figure out what it was. How do I make it take the input > > from mic in only? > > In ALSA, most cards have a mixer control "Capture Source" which allows > to select between several input. Some cards have "Capture Volume" > controls for each input and mix all together. > > > HTH > Clemens > > > > > ------------------------------------------------------- > This SF.net email is sponsored by: The Robotic Monkeys at ThinkGeek > For a limited time only, get FREE Ground shipping on all orders of $35 > or more. Hurry up and shop folks, this offer expires April 30th! > http://www.thinkgeek.com/freeshipping/?cpg=12297 > _______________________________________________ > Alsa-devel mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/alsa-devel > ------------------------------------------------------- This SF.Net email is sponsored by: Oracle 10g Get certified on the hottest thing ever to hit the market... Oracle 10g. Take an Oracle 10g class now, and we'll give you the exam FREE. http://ads.osdn.com/?ad_id149&alloc_id66&op=click _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
