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Graham Percival wrote:
| On Sun, 01 Jun 2003 22:54:27 +0100
| Tim <helycos(a)lycos.co.uk> 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
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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 --------------------------------