Hi Digger, The "PCM Capt" control in alsa is equivalent to the "Digital Gain" control in OS X, and the "Mic" control in alsa is equivalent to the "Preamplifier gain" control in OS X. The monitoring level does'nt affect the record.
Regards, Alain > ---------- > De : digger vermont > Envoy� : Sunday, February 29, 2004 2:09 AM > � : Alain CrZtet > Cc : Alsa Users > Objet : Re: [Alsa-user] RE : [Alsa-user] Vxpocket V2, does digital gainor mic > preamp work? > > Hello Alain, > > Thanks for your reply. > > On Fri, 2004-02-27 at 03:13, Alain Cr�tet wrote: > > Hi digger, > > > > The 'PCM Capt' control is the digital input level. > > The 'Mic' control is a switch for the input selector and the analog input > > level (for the Mic only). > > I guess I don't quite understand. In 'VX Control' (macosx) while using > the mic input there is a 'Digital Gain' control from infinity to 18db. > Is that the equivalent of the 'Mic" control in alsa? > > Then with 'VX Control' in macosx there is a 'Preamplifier Gain' control > that goes from +30db to +51db. Is it not yet implemented in alsa? In > the source there seem to references to it, but I can't understand it > enough to know if it is. > > > > > I have tested it with alsa 1.0.0rc1 and arecord, it's ok. > > > > Do you have unmute the 'Monitoring' control and set it to the correct > > level ? > > I can hear it. Or do you mean that the 'Monitor' control should effect > the recording level? I've tried with everything on and 100% and looking > at the waveform the level is low. The only control that seems to have > any effect is 'Mic'. > > In macosx at a normal speaking level I can easily drive the recorded > level into clipping. With alsa and linux I have to shout to get near > there. > > Not that I want to cause clipping, but I need to record some low level > sound like water dripping. Without adding an external preamp it won't > work. > > Thanks again for your help, > > digger > > > > > > ---------- > > > De : digger vermont > > > Envoy� : Thursday, February 26, 2004 8:46 PM > > > � : Alsa Users > > > Objet : [Alsa-user] Vxpocket V2, does digital gain or mic preamp work? > > > > > > Hello all, > > > > > > I've a Vxpocket V2 I'm using on a powerbook g4 with alsa 1.0.2c. Using > > > arecord, the recorded level with a mic (Shure SM57) is low about -30db. > > > The 'PCM Capture Volume' which I think is supposed to be the > > > digital-gain or the mic-preamp seems to have no effect. Is this > > > control functional or am I trying the wrong thing? > > > > > > Thanks for any help > > > > > > digger > > > > > > ------------------------------------------------------- SF.Net is sponsored by: Speed Start Your Linux Apps Now. Build and deploy apps & Web services for Linux with a free DVD software kit from IBM. Click Now! http://ads.osdn.com/?ad_id56&alloc_id438&op=click _______________________________________________ Alsa-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-user
