All my other Windows sound devices with two channels have independent level controls, one for each channel, plus the ability to link them together and adjust equally.
For whatever reason, I've often found that I need a different level setting to set the no-signal baseline in the decoders for each receiver. In theory, perhaps that shouldn't be necessary but in practice it is. Ed W0YK -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Guy Olinger K2AV Sent: 14 June, 2016 14:24 To: Ed Muns Cc: Jeff Stai; Elecraft Mailer Subject: Re: [Elecraft] Performance of internal USB sound system compared toexternal one? To be strict, a stereo gain control (volume is a misnomer) will adjust both channels equally, then if supplied, there is a balance control which creates a ratio of left to right channel gain which is maintained regardless of the gain control. What you seem to be asking for is the ability to treat left and right as if they were independent channels, which I would guess is very rare in drivers. "Volume" depends on channel gain and a lot of other things. At the input of various end user devices, the volume range is specified. The volume coming from upstream devices can depend on a lot of things, RF gain, AGC settings, conditions, and possibly others in addition to codec channel gain. Why would you need a stereo balance control for use in data modes? Dual RX and "diversity" decode? If a K3 dual RX diversity kind of operation, why wouldn't equal gain on left and right be required? Regardless, 73 and good luck, Guy K2AV On Tue, Jun 14, 2016 at 4:54 PM, Ed Muns <[email protected]> wrote: > Yes, there are two receive audio channels for the Main and Sub receivers in > the CODEC. The Windows driver level control adjusts both channels > identically. If there is any unbalance or for some reason you want to > independently adjust the two channels, it can't be done. The driver > communication with Windows should trigger the stereo level control, but > doesn't. > > The CODEC is the TI PCM-2902. > > Ed W0YK > _____ > > From: Jeff Stai [mailto:[email protected]] > Sent: 14 June, 2016 13:15 > To: [email protected] > Cc: Robert Wood; Ken Arck; Elecraft Mailer > Subject: Re: [Elecraft] Performance of internal USB sound system compared > toexternal one? > > On Tue, Jun 14, 2016 at 12:44 PM, Ed Muns <[email protected]> wrote: > > One issue I have with the K3S CODEC is that Windows installs a monaural > level control rather than separate left and right channel level controls for > the two receive audio streams. There also seems to be some kind of AGC > action going on where the levels actually change over time. This appears to > be eliminated by the chip manufacturer's CODEC driver that I found online, > though it is still monaural. > > You still have a left and right channel, you just can't set the levels > independently, correct? > > I haven't seen the AGC issue, but maybe I haven't noticed the levels > changing very much. Who is the chip mfr? > > Thanks! - jeff wk6i ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
