Le Wed, 19 Oct 2011 18:12:49 +0200, Martijn Schmidt <martijn.schmidt@xxxxxxxxx> a écrit : > Hello ALSA, > > I'm using a M-Audio Audiophile 2496 soundcard, running on the ice1712 > driver. Everything works (I get output, and I can record) but for some > reason I can't adjust my ADC volume, analog-to-digital converter. > > This is an issue because my analog source is loud enough to cause > audible clipping in the recording during certain bass-heavy passages. > To be clear: a full analog chain directly from turntable to > amplifiers to speakers sounds great, but the recorded file played > back on those same amplifiers and speakers (from turntable to phono > stage to soundcard RCA inputs) does not. > > After Googling I found out I should be able to adjust ADC volume > with, among others, alsamixer/envy24control/audacity. There's no > sliders for it in alsamixer (F4 for capture does show DAC0 + DAC1 but > these affect output volume) or envy24control (should have ADC0 and > ADC1 on the Analog Volume tab) though, and in audacity the slider is > greyed out. This card have only one hardware mixer: playback PCM. For best use of this card, an external analog mixer is recommended on the input. Also, alsamixer is a hardware mixer that will show only the hardware controls. In your case, the only mixer will be the PCM playback. I guess than the envy24control is also a hardware mixer. A workaround will be to use a software mixer like jack_mixer, but this will be of no help if the clipping occur in the ADC. Another workaround would be to make a custom input cable with an attenuator in it. http://www.uneeda-audio.com/pads/ > > Puzzled, I upgraded (from 2.6.38) and reconfigured my new kernel > (3.0.6) from scratch but still no improvement. I'm running Gentoo. > > Does anyone happen to know what's going on? I'd be happy to provide > any other information you need. > > Sincerely and thanks for your time, > > Martijn Schmidt -- "We have the heroes we deserve." ------------------------------------------------------------------------------ The demand for IT networking professionals continues to grow, and the demand for specialized networking skills is growing even more rapidly. Take a complimentary Learning@Ciosco Self-Assessment and learn about Cisco certifications, training, and career opportunities. http://p.sf.net/sfu/cisco-dev2dev _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
