The bias is provided by the codec afaik On Wednesday, 4 June 2014 13:04:51 UTC+1, Mickae1 wrote: > > "However, the mic is not powered as no bias is being provided" > > If the micro is powered by a PIN, you have to tell the cape manager > through the dtbo to power the micro . > > Micka, > > > On Wed, Jun 4, 2014 at 1:11 PM, Tristan Phillips <tris.p...@gmail.com > <javascript:>> wrote: > >> In addition, my engineer tells me we are using MIC3L which is not used on >> the audio cape. Thats what I need to get working... >> >> On Wednesday, 4 June 2014 11:50:48 UTC+1, Tristan Phillips wrote: >>> >>> Hi all, >>> >>> Bit of a strange question... We are working on something which uses a >>> tlv320 >>> in the same layout as the audio cape, with one difference, we have >>> *added* an electret mic. So our board has line out left/right, line in >>> left/right and also mic in. >>> >>> Apart from changing the i2c bus everything else is the same. With a >>> modded overlay (addressing the right i2c bus) output and line input work as >>> expected. However, the mic is not powered as no bias is being provided. >>> Also the Alsa mixer does not mention the mic anywhere. >>> >>> My assumption is that I need to modify the device tree overlay to tell >>> the driver that we have a mic present (I'm rather new to audio and dto's, >>> so forgive me if I'm talking rubbish). >>> >>> Could anyone point me in the right direction to getting this mic working? >>> >>> Thanks in advance! >>> >>> Tris >>> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to beagleboard...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > >
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