I'm having problems with distorted sound with ALSA. It's not clipping distortion but more like a dirty spectra. The test I am doing is playing a pure 440Hz sawtooth wave, and the sound is very unclean, there's inharmonic partitials that shouldn't be there, actually below the fundamental frequency I think. Compared to an analog sawtooth oscillator it sounds really awful. Here's the detailed tests I have been doing: Sound sources: (440Hz sawtooth with 0.8 amplitude created in Audacity) • saw44.wav: 16 bit, mono 44100 Hz • saw48.wav: 16 bit, mono 48000 Hz These files were played with aplay on two machines and three different soundcards: Machine 1 • Kernel 2.6.22.7 • ALSA drivers 1.0.14 • ALSA library 1.0.13 and 1.0.15rc3 • USB Soundcard Terratec Phase 26 • Internal Soundcard HDA-Intel - HDA VIA VT82xx Machine 2 • Kernel 2.6.14.3 • ALSA drivers 1.0.10rc1 • ALSA library 1.0.10 • USB Soundcard Terratec Phase 26 • Internal Soundcard Intel 82801CA-ICH3 with AD1886A I also tried a custom JACK client that produced a sawtooth in realtime on machine 1 with Terratec Phase 26. The results is the same inharmonic distortion in all tests. -- /Jonatan [ http://kymatica.com ] ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
