-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Graham Percival wrote: | On Sun, 01 Jun 2003 22:54:27 +0100 | Tim &lt;helycos(a)lycos.co.uk&gt; wrote: | |>I want to record audio from my USB port and seek a command line or |>reliable and simple GUI app. Can anyone suggest what might suit me? | | | I recommend ecasound. It's in the Debian packages; the website is | http://www.eca.cx | | Cheers, | - Graham | | | OK, thanks everyone for your suggestions. I'm pleased to discover the laptop can handle 80 minutes of ecasound. rec also works fine. However a few issues have arisen: 1. Distortion results when recording from some sources but not others. ~ Yamaha amplifier 'minidisc out' connection, Cambridge Audio CD player out connection, Pioneer tuner out connection. If I record from a Sony portable CD player 'line out' connection, there is no distortion. It makes me suspect these devices are outputting more than line out volume. ~ They are all of good quality. Alteration of the input volume on the command line of rec doesn't alter this distortion. I've attached the ecasound -ev output. 2. The recording software stops if the source becomes silent, identifying it as the USB device fault: usbaudio: unregister dsp 14,19 hub.c: Cannot enable port 1 of hub 1, disabling port. hub.c: Maybe the USB cable is bad? hub.c: USB new device connect on bus 2/1, assigned device number 3 usbaudio: valid input sample rate 44100 <snip> I don't consider the USB cable to be bad as it records fine for a full length of 80 minutes as long as there is no silence. I'm using an Edirol UA-1A audio capture device, simply an outboard DAC. I would be grateful if any of you have comments or suggestions for me. Thanks in advance, Tim sig@debian:~$ ecasound -ev -i /dev/dsp1 **************************************************************************** * ecasound v2.0.3 (C) 1997-2001 Kai Vehmanen * **************************************************************************** - [ Chainsetup/Adding chain operator "Volume-analyze" ] -------------------- Setting parameters: cumulative-mode = 1.00, result-max-multiplier = 1.00 - [ Chainsetup/Enabling audio inputs ] ------------------------------------- (eca-audio-objects) Audio object "/dev/dsp1", mode "read". (audio-io) Format: s16_le, channels 2, srate 44100, interleaved. - [ Chainsetup/Enabling audio outputs ] ------------------------------------ (eca-audio-objects) Audio object "/dev/dsp", mode "write". (audio-io) Format: s16_le, channels 2, srate 44100, interleaved. - [ Engine/Init - mixmode "simple" ] --------------------------------------- - [ Engine/Exiting ] ------------------------------------------------------- (audiofx) -- Amplitude statistics ----------------------------- Range, pos/neg, count,(%), ch1...n Pos -1.0 dB: 25885,1.94% 29185,2.18% Pos -2.0 dB: 7693,0.58% 7595,0.57% Pos -4.0 dB: 19457,1.46% 18222,1.36% Pos -8.0 dB: 64540,4.83% 61128,4.57% Pos -16.0 dB: 223825,16.75% 219283,16.41% Pos -32.0 dB: 267091,19.99% 275292,20.60% Pos -64.0 dB: 56316,4.21% 57832,4.33% Pos -inf.0 dB: 2337,0.17% 2425,0.18% Neg -inf.0 dB: 2315,0.17% 2393,0.18% Neg -64.0 dB: 56739,4.25% 57411,4.30% Neg -32.0 dB: 268665,20.10% 270983,20.28% Neg -16.0 dB: 224683,16.81% 217492,16.28% Neg -8.0 dB: 63914,4.78% 60383,4.52% Neg -4.0 dB: 19194,1.44% 19124,1.43% Neg -2.0 dB: 7617,0.57% 7723,0.58% Neg -1.0 dB: 26049,1.95% 29849,2.23% (audiofx) Peak amplitude, period: pos=0.99997 neg=1.00000. (audiofx) Peak amplitude, all : pos=0.99997 neg=1.00000. (audiofx) Clipped samples, period: pos=24244 neg=23355. (audiofx) Clipped samples, all : pos=24244 neg=23355. (audiofx) Max gain without clipping, all: 1.00000. (audiofx) -- End of statistics --------------------------------

Kai Vehmanen wrote: Please forgive me Kai, I don't know if I'm being ignorant but... $ ecasignalview /dev/dsp1 Caught an unknown exception $ ecasignalview testfile.wav gives correct output. I'm using OSS (as I'm still with a 2.4.18 kernel), and will use aumix for your suggestion once I know how to access /dev/dsp1. As I'm using line out from the source, I will not be able to alter the volume at that end. Thanks loads for helping. And producing that app in the first place! Tim

Kai Vehmanen wrote: Works, I've attached the output of 30 seconds analysis from my amp as source, as well as the portable CD player which doesn't have the clipping problem. I've also attached kern.log messages, which will explain why alteration of my mixer controls makes no difference to the clipping. This USB audio device is very simple, all it does is convert analogue to digital signal. Its worth noting that the clipping also occurs within windows and on another PC. aumix -d /dev/mixer -I aumix -d /dev/mixer1 -I are accessible, however make no difference to the clipping from the amp source, including IGain. Muting all parameters within aumix makes no difference to the signal. Would it be possible I've bought a dud analogue-digital converter, which suffers clipping at normal line volume? Thanks again for your help. Tim sig@debian:~$ ecasignalview -f:16,2,44100 /dev/dsp1 null (audiofx) -- Amplitude statistics ----------------------------- Range, pos/neg, count,(%), ch1...n Pos -1.0 dB: 27873,2.08% 34558,2.57% Pos -2.0 dB: 16638,1.24% 18953,1.41% Pos -4.0 dB: 48725,3.63% 52037,3.88% Pos -8.0 dB: 139288,10.38% 144902,10.79% Pos -16.0 dB: 247324,18.42% 239696,17.86% Pos -32.0 dB: 168665,12.57% 158772,11.83% Pos -64.0 dB: 30891,2.30% 29415,2.19% Pos -inf.0 dB: 1330,0.10% 1214,0.09% Neg -inf.0 dB: 1273,0.09% 1233,0.09% Neg -64.0 dB: 30584,2.28% 28874,2.15% Neg -32.0 dB: 160975,11.99% 152850,11.39% Neg -16.0 dB: 229714,17.11% 225017,16.76% Neg -8.0 dB: 140411,10.46% 142400,10.61% Neg -4.0 dB: 51498,3.84% 55201,4.11% Neg -2.0 dB: 17539,1.31% 19828,1.48% Neg -1.0 dB: 29608,2.21% 37386,2.79% (audiofx) Peak amplitude, period: pos=0.99997 neg=1.00000. (audiofx) Peak amplitude, all : pos=0.99997 neg=1.00000. (audiofx) Clipped samples, period: pos=22779 neg=29496. (audiofx) Clipped samples, all : pos=22779 neg=29496. (audiofx) Max gain without clipping, all: 1.00000. (audiofx) -- End of statistics -------------------------------- sig@debian:~$ ecasignalview -f:16,2,44100 /dev/dsp1 null (audiofx) -- Amplitude statistics ----------------------------- Range, pos/neg, count,(%), ch1...n Pos -1.0 dB: 0,0.00% 0,0.00% Pos -2.0 dB: 0,0.00% 0,0.00% Pos -4.0 dB: 47,0.00% 20,0.00% Pos -8.0 dB: 13221,1.01% 6771,0.52% Pos -16.0 dB: 211236,16.07% 189655,14.43% Pos -32.0 dB: 372602,28.34% 394014,29.97% Pos -64.0 dB: 61800,4.70% 67646,5.15% Pos -inf.0 dB: 2547,0.19% 2768,0.21% Neg -inf.0 dB: 2406,0.18% 2687,0.20% Neg -64.0 dB: 60550,4.61% 66711,5.07% Neg -32.0 dB: 361757,27.52% 384739,29.27% Neg -16.0 dB: 216409,16.46% 194953,14.83% Neg -8.0 dB: 11982,0.91% 4596,0.35% Neg -4.0 dB: 3,0.00% 0,0.00% Neg -2.0 dB: 0,0.00% 0,0.00% Neg -1.0 dB: 0,0.00% 0,0.00% (audiofx) Peak amplitude, period: pos=0.69818 neg=0.65366. (audiofx) Peak amplitude, all : pos=0.69818 neg=0.65366. (audiofx) Clipped samples, period: pos=0 neg=0. (audiofx) Clipped samples, all : pos=0 neg=0. (audiofx) Max gain without clipping, all: 1.43229. (audiofx) -- End of statistics ------------------------------- Jun 5 18:36:32 debian kernel: hub.c: USB new device connect on bus1/3, assigned device number 2 Jun 5 18:36:32 debian kernel: usbaudio: device 2 audiocontrol interface 0 has 1 input and 1 output AudioStreaming interfaces Jun 5 18:36:32 debian kernel: usbaudio: valid input sample rate 44100 Jun 5 18:36:32 debian kernel: usbaudio: device 2 interface 2 altsetting 1: format 0x80000010 sratelo 44100 sratehi 44100 attributes 0x00 Jun 5 18:36:32 debian kernel: usbaudio: device 2 interface 1 altsetting 0 does not have an endpoint Jun 5 18:36:32 debian kernel: usbaudio: valid output sample rate 44100 Jun 5 18:36:32 debian kernel: usbaudio: device 2 interface 1 altsetting 1: format 0x80000010 sratelo 44100 sratehi 44100 attributes 0x00 Jun 5 18:36:32 debian kernel: usbaudio: registered dsp 14,19 Jun 5 18:36:32 debian kernel: usbaudio: constructing mixer for Terminal 3 type 0x0304 Jun 5 18:36:32 debian kernel: usbaudio: no mixer controls found for Terminal 3 Jun 5 18:36:32 debian kernel: usbaudio: constructing mixer for Terminal 7 type 0x0101 Jun 5 18:36:32 debian kernel: usbaudio: no mixer controls found for Terminal 7 Jun 5 18:36:32 debian kernel: usb_audio_parsecontrol: usb_audio_state at c2509e40

On Fri, Jun 06, 2003 at 09:37:55AM +0200, Clemens Ladisch wrote: Remember also that there are two standards for line level: "pro" (+4) and "consumer" (-10). THere's about 14 dB difference between them. I say "about" because IIRC they use different references for 0 dB or something. But "pro" really is a lot louder. -- Paul Winkler http://www.slinkp.com

Tim wrote: FWIW Pro is usually 1/4 inch and consumer is RCA. -- Patrick Shirkey - Boost Hardware Ltd. Http://www.boosthardware.com Http://www.djcj.org - The Linux Audio Users guide ======================================== Being on stage with the band in front of crowds shouting, "Get off! No! We want normal music!", I think that was more like acting than anything I've ever done. Goldie, 8 Nov, 2002 The Scotsman