[Alsa-user] =?iso-8859-1?Q?RE=A0=3A_=5BAlsa-user=5D_RE=A0=3A_=5BAlsa-user=5D_Vxpo?= =?iso-8859-1?Q?cket_V2=2C_does_digital_gainor_mic_preamp_work=3F?=

[<cr...@di...>]

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=E9 : 	Sunday, February 29, 2004 2:09 AM
> =C0 : 	Alain CrZtet
> Cc : 	Alsa Users
> Objet : 	Re: [Alsa-user] RE : [Alsa-user] Vxpocket V2, does digital =
gainor mic preamp work?
>=20
> Hello Alain,
>=20
> 	Thanks for your reply.
>=20
> On Fri, 2004-02-27 at 03:13, Alain Cr=E9tet wrote:
> > 	Hi digger,=20
> >=20
> > 	The 'PCM Capt' control is the digital input level.
> > 	The 'Mic' control is a switch for the input selector and the analog =
input=20
> > level (for the Mic only).
>=20
> 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?
>=20
> 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.
>=20
> >=20
> > 	I have tested it with alsa 1.0.0rc1 and arecord, it's ok.
> >=20
> > 	Do you have unmute the 'Monitoring' control and set it to the =
correct=20
> > level ?
>=20
> 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'.
>=20
> 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.
>=20
> 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.
>=20
> Thanks again for your help,
>=20
> digger
>=20
> >=20
> > > ----------
> > > De : 	digger vermont
> > > Envoy=E9 : 	Thursday, February 26, 2004 8:46 PM
> > > =C0 : 	Alsa Users
> > > Objet : 	[Alsa-user] Vxpocket V2, does digital gain or mic preamp =
work?
> > >=20
> > > Hello all,
> > >=20
> > > 	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?
> > >=20
> > > Thanks for any help
> > >=20
> > > digger
> > >=20
>=20
>=20
>=20