Date: Fri, 22 Apr 2011 23:15:01 -0300 From: Marcel Bonnet <marcelbonnet@gmail.com> To: freebsd-multimedia@freebsd.org Subject: uaudio, M-Audio FastTrack Pro device - sound distorted Message-ID: <BANLkTimAZtcpe2Ba5P0qsHKiH2-G691GCQ@mail.gmail.com>
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Hi, folks. I'm using the M-AUDIO FastTrack Pro USB audio interface, but every time I play or record, the sound get distorted. If I record a clean guitar, it sounds like using a light distortion/driver. Any mp3 or wav I play is distorted too, especialy the higher notes. This device has it's own mixer. I'm sure the sound is not clipping because the interface has its own knobs (volume/gain for in/out) and a led for clipping indication. I tried to change the volume using the mixer command - nothing changed. I thought the problem could be the frequency rate: tried the sysctl dev.pcm.0.play.vchanmode (tried the 3 values without any difference) and the dev.pcm.0.play.vchanrate (but the system always mantain the same freq = 44100). No sucess too. I just don't know what to do. Don't even know if I'm in the right direction. Maybe it could be a driver's problem? I apreciate any help. Below there are some information. Thanks in advance, Marcel Bonnet. -------------- # dmesg ugen0.2: <M-Audio> at usbus0 uaudio0: <FastTrack Pro> on usbus0 uaudio0: Play: 44100 Hz, 2 ch, 16-bit S-LE PCM format uaudio0: Record: 48000 Hz, 2 ch, 16-bit S-LE PCM format uaudio0: MIDI sequencer pcm0: <USB audio> on uaudio0 # usbconfig -u 0 -a 2 ugen0.2: <FastTrack Pro M-Audio> at usbus0, cfg=0 md=HOST spd=FULL (12Mbps) pwr=ON # sysctl hw.snd hw.snd.feeder_rate_quality: 1 hw.snd.feeder_rate_round: 25 hw.snd.feeder_rate_max: 2016000 hw.snd.feeder_rate_min: 1 hw.snd.feeder_rate_polyphase_max: 183040 hw.snd.feeder_rate_presets: 100:8:0.85 100:36:0.92 100:164:0.97 hw.snd.feeder_eq_exact_rate: 0 hw.snd.feeder_eq_presets: PEQ:16000,0.2500,62,0.2500:-9,9,1.0:44100,48000,88200,96000,176400,192000 hw.snd.vpc_reset: 0 hw.snd.vpc_0db: 45 hw.snd.vpc_autoreset: 1 hw.snd.latency_profile: 1 hw.snd.latency: 5 hw.snd.report_soft_matrix: 1 hw.snd.report_soft_formats: 1 hw.snd.compat_linux_mmap: 0 hw.snd.vpc_mixer_bypass: 1 hw.snd.verbose: 1 hw.snd.maxautovchans: 16 hw.snd.default_unit: 0 hw.snd.version: 2009061500/i386 hw.snd.default_auto: 0 # sysctl dev.pcm dev.pcm.0.%desc: USB audio dev.pcm.0.%driver: pcm dev.pcm.0.%parent: uaudio0 dev.pcm.0.play.vchans: 1 dev.pcm.0.play.vchanmode: fixed dev.pcm.0.play.vchanrate: 44100 dev.pcm.0.play.vchanformat: s16le:2.0 dev.pcm.0.rec.vchans: 1 dev.pcm.0.rec.vchanmode: fixed dev.pcm.0.rec.vchanrate: 48000 dev.pcm.0.rec.vchanformat: s16le:2.0 dev.pcm.0.buffersize: 0 dev.pcm.0.bitperfect: 0 # cat /dev/sndstat FreeBSD Audio Driver (newpcm: 32bit 2009061500/i386) Installed devices: pcm0: <USB audio> at ? kld snd_uaudio (1p:1v/1r:1v) default # mixer -f /dev/mixer0 Mixer vol is currently set to 75:75 Mixer pcm is currently set to 75:75
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