On Sat, 26 Dec 2009, Dylan William Hardison wrote:
> On Saturday, December 26, 2009 at 06:56PM -0500, Eben King wrote:
>> I got a USB turntable for Christmas. Yay. Unfortunately, I could not
>> get a USB connection to work (one I compiled usb-audio I got no sound
>> here [Ubuntu 6.xx LTS], and very choppy sound on the laptop [Ubuntu 8.04
>> LTS]). So I switched to using Line In through my Soundblaster Live!
>> here.
>>
>> I can get playthrough to work by unmuting and raising the "Line" slider,
>> but nothing I do allows me to record from Line IN. Right now, I'm using
>> Audacity. Its input is set to "ALSA SB Live 5.1: ADC Capture/Standard
>> PCM Playback (hw:0.0)". (Yes, I tried the obvious approaches of setting
>> the mixer to capture to "Line" and zero or more of "Front" and "Wave".)
>>
>> I don't mind hearing while I record, but I'd then have to make sure no
>> other sounds happened while I recorded. Any clues?
>
> I think this actually answers your question:
>
> Open alsamixer (terminal app)
> hit <tab> to get to the "Capture" view. Select "Line in" using left/right
> arrows, and then press <space>, Some red text reading "CAPTUR" or
> similar will appear below the "Line In" control.
>
> basically, you have to tell alsa you want to capture from the line in
> device.
Got it to work (sorta). This sound card('s driver) is weird; it needs:
Switch to the recording part of the mixer, and set "Line" as Capture,
and also "Capture" as Capture. Yes, there's a slider called "Capture".
Raise the "Capture" and "AC97" sliders. If you want to hear it too, switch
to the playback part of the mixer and unmute and raise "Line".
> Now a normal sound recording device should work.
I plan to use xoscope to adjust levels, then record with arecord, de-noise
with gwc, normalize with sox, split with audacity, then mp3 with lame. Of
course steps 2, 3, and 4 could all be done in audacity if it doesn't suck.
When I try to record with audacity, it prints:
Expression 'snd_pcm_prepare( stream->playback.pcm )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 2061
Expression 'AlsaStart( stream, 0 )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 2371
Expression 'AlsaRestart( self )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 2412
Expression 'PaAlsaStream_HandleXrun( self )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 2949
eight times, then
Expression 'PaAlsaStream_WaitForFrames( stream, &framesAvail, &xrun )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 3222
That's since I installed some stuff looking for a meter so I could tell when
I figured out the mixer settings to record from Line In. Not necessarily
when anything new is running; no, that's too easy.
> Also, as long as the mic isn't set to CAPTUR, you should not need to worry
> about anyone messing up your recordings.
Oh, I was (briefly) considering recording the main output of the card, so
not only the microphone, but other sounds the computer might make would mess
up the recording.
> Granted, as someone else mentioned, this solution might not be optimal,
> but the steps are required even if you have a $200 audio capture card. ;)
My preference is to record via USB, assuming that the inside of the
turntable is a lower-noise environment than the inside of a computer and
that the turntable's A/D converter is better than the one on the sound card.
But every site I can find about USB audio implies it just works. Great,
what do I do when it doesn't? Analog may be noisier and lower tech, but it
_works_. I'll have to see if I can hear the noise, given the suboptimal
listening environment here and the grotty overplayed source material.
-- -eben QebWenE01R@vTerYizUonI.nOetP http://royalty.mine.nu:81 SCORPIO: Get ready for an unexpected trip when you fall screaming from an open window. Work a little harder on improving your low self esteem, you stupid freak. -- Weird Al, _Your Horoscope for Today_ ----------------------------------------------------------------------- This list is provided as an unmoderated internet service by Networked Knowledge Systems (NKS). Views and opinions expressed in messages posted are those of the author and do not necessarily reflect the official policy or position of NKS or any of its employees.
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