It sounds to me that the problem Nick Arnold is describing is that in single-speed (48kS/s) mode, channels 0, 8, and 16 have a 1-sample delay with respect to all the other channels (using 0-based indexing for channel numbers here). This is irrelevant when recording uncorrelated signals, and subtle when dealing with time-coherent signals (single-point stereo or Ambisonic for example). When splitting one signal across two channels, it is deadly.
The easiest way to check this is to digitally generate a high frequency sine wave (say 10kHz), and patch it (digitially) to channels 0 and 1 or 8 and 9 (or just go ahead and send it to all the channels). Make sure that there are no mismatched delays in whatever tool(s) you use to make the patches. Record this signal -- even a few milliseconds is enough. Then look at it in a waveform editor and zoom way in so you can see the individual samples. Check the temporal alignment between track 1 and track 2 (using 1-based indexing here). Better yet, subtract the two tracks. If all is well the result will be zero; if they are misaligned, you'll get another 10k sine wave with lower amplitude. I don't have digital generator in the same setup as my HDSP (independent of the HDSP that is). So, I can't do this test without a lot of moving around. I am interested in seeing this (possible) problem taken care of. --Rob ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. SourceForge.net hosts over 70,000 Open Source Projects. See the people who have HELPED US provide better services: Click here: http://sourceforge.net/supporters.php _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
