At Sun, 3 Sep 2006 16:53:57 +0100, Jochen Voss wrote: > > Hi Takashi, > > sorry about the delay, I was travelling again. > > On Mon, Aug 28, 2006 at 01:38:21PM +0200, Takashi Iwai wrote: > > Also, I found an error in AK5365 capture gain and fixed in this patch. > > Now there are two capture volume controls, "Capture Volume" and > > "Capture Gain Volume". The former is the attenuation up to 0dB, the > > latter is IPGA (independent gain) in AK4524/4528. Jochen, please > > try this patch with your revo 5.1 board. > > I do not quite understand the new volume controls. I think something > is wrong, now. What is the expected behaviour of the controls? > > From table 17 (page 35) of the AK5365 specs I think that IPGA and DATT > are only separate units inside the chip, but should be treated as one > continuous scale for the purpose of the driver. The table looks like > the input volume can be adjusted in steps from "mute" to +12dB. Why > would we want two controls here? Actually they are treated independently in the chip. IPGA works like a preamp, and the total volume is IPGA + DATT. Even if you set a value to IPGA with MSB, say 0x82, DATT won't be changed and the old value is kept. And it's vice versa - if you set 0x02 later, IPGA will stay as 0x82. This is so, at least with AK4524 and AK4528. Possibly this was changed on AK5365, though... > Also I notice the presence of a "PCM Capture Gain Capture" control, > which looks wrong. I can change "PCM Capture Gain Capture" on its > own, but when I change "PCM Capture Gain", the "PCM Capture Gain > Capture" control jumps to have the same value. Hm, there is no "PCM Capture Gain Capture", maybe "PCM Capture Gain Volume"? It's IPGA. Takashi ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
