Hello all, I've been trying to record a log sweep using the following script: http://www.duffroomcorrection.com/wiki/Measure_Jack script
It generates a clean sweep file, as can be seen in the pretty pictures below (the generated.* files, or msplaysweep.ogg). I didn't have room to put the wavs up (9MB each), but the spectrograms are from the wavs not the oggs anyhow. http://homepage.ntlworld.com/jonahood/drc/ When msplaysweep.wav is played back under linux it sounds wrong -- as if it's aliasing (?) -- but perfect when played back under windows on the same machine. It sounds bad regardless of whether I use alsa (alsaplayer -oalsa / aplay -r48000) or running through JACK (alsaplayer -ojack), and recording it with a loopback produces the files with spectrograms recorded.* or msrecsweep.ogg in the same directory. The recorded wavs when played back under windows sound exactly as the clean sweep sounds when played under linux (i.e. screwed up) and the spectrograms clearly show something is very amiss, but I don't know what: I haven't touched any alsa config files, I'm just using it as it installed iteslf with Ubuntu 6.60lts As below, I'm running JACK at 48khz which is the soundcards native sampling rate, [EMAIL PROTECTED]:~$ jackd -R -dalsa -p2048 -r48000 -P -S jackd 0.100.0 Copyright 2001-2005 Paul Davis and others. jackd comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details JACK compiled with System V SHM support. loading driver .. apparent rate = 48000 creating alsa driver ... hw:0|-|2048|2|48000|0|0|nomon|swmeter|-|16bit control device hw:0 configuring for 48000Hz, period = 2048 frames, buffer = 2 periods nperiods = 2 for playback The only odd message is this which alsaplayer gives me: jack: using ports "brutefir:input-0" and "brutefir:input-1" for output jack: running interface at 48000 instead of 44100 Any help most appreciated, Tom ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
