Hi John, Thanks for the detailed info.
I am actually trying to route to the mono line but having difficulties, have you attempted to do that? We have a custom board with an on-board TLV320AIC3106 but want to connect up the EVM to a stock BBB to isolate potential hardware issues (and we can't easily access the mono line as it is connected directly to the microphone input of another component). Using alsamixer, we've turned on the mono line, upped the DAC mixing volume to max and turned on DAC L mixing. DAC L is set to output to the mixer (L1). I was able to get this to work using the Windows software using what look to be similar / identical settings. Ultimately, we are trying to loopback USB microphone input on one of the digital channels through to the MONO line, while at the same time routing LINE1L to the LEFT channel. Hopefully this is possible. It's an inherited board design so we're hoping to avoid hardware changes. One thing we've been struggling to understand is what the audio routing section does in the device tree overlay so any advice you can give on that would be appreciated. Best Regards, Evan On 30 Sep 2014, at 21:32, John Syn <[email protected]> wrote: > > From: Evan Davey <[email protected]> > Reply-To: "[email protected]" <[email protected]> > Date: Tuesday, September 30, 2014 at 12:54 PM > To: "[email protected]" <[email protected]> > Subject: Re: [beagleboard] Beaglebone Audio Cape Rev B audio Input > >> Thanks, I also managed to subsequently dig this up >> http://article.gmane.org/gmane.comp.hardware.beagleboard.user/63099. >> >> I'll probably try the same thing but inject the 1.8V from my bench supply. > > Look at /arch/arm/boot/dts/am335x-bone-common-pinmux.dtsi line 220. These are > the pins used to connect to the TLV320AIC3106EVM. The table below shows how I > got this working. > > BBB TLV320AIC3106EVM LTC3603 > P9 J17 J16 J15 J5 > 1 GND 4 5 GND > GND > 3 3V3 9 3V3 2 VOUT_EN > > 5 VDD_5V0 3 +5V > VIN > 7 SYS_5V0 > > 10 SYS_RESETN 14 RESETN > > 19 I2C2.SCL 16 SCL > > 20 I2C2.SDA 20 SDA > > 25 mcasp0_ahclkx 17 MCLK > > 28 mcasp0_axr2 13 DIN > > 29 mcasp0_fsx 7 WCLK > > 30 mcasp0_axr0 11 DOUT > > 31 mcasp0_aclkx 3 BCLK > > 43 GND 18 > > 7 1V8D > VOUT > > Regards, > John >> >> >> On 30 Sep 2014, at 20:50, evilwulfie <[email protected]> wrote: >> >>> http://elinux.org/CircuitCo:Audio_Cape_RevB >>> schematics and everything there >>> >>> >>> On 9/30/2014 11:35 AM, [email protected] wrote: >>>> Hi John, >>>> >>>> Can you please send through details on how you connected the >>>> TLV320AIC3106EVM to the BBB - I am trying to do the same thing. >>>> >>>> Cheers, >>>> Evan >>>> >>>> On Monday, May 19, 2014 12:22:39 AM UTC+1, john3909 wrote: >>>>> >>>>> >>>>> From: Raphael Philipe <[email protected]> >>>>> Reply-To: <[email protected]> >>>>> Date: Sunday, May 18, 2014 at 3:30 PM >>>>> To: <[email protected]> >>>>> Subject: [beagleboard] Beaglebone Audio Cape Rev B audio Input >>>>> >>>>>> >>>>>> Hi >>>>>> >>>>>> I've acquired an Audio Cape Rev B >>>>>> http://elinux.org/CircuitCo:Audio_Cape_RevB for my Beaglebone Black. >>>>>> >>>>>> Following the instructions I was able to make it work. The audio >>>>>> playback is working pretty well. However, I cannot test the audio input. >>>>>> I saw that it is a line level input (line in), so it cannot be connected >>>>>> to a regular microphone. >>>>>> >>>>>> I want to test it through an echo scheme. I will produce some sound >>>>>> through q source (connected to the line in input of the cape) and check >>>>>> the response in the audio output, through an earphone. >>>>>> >>>>>> I tried to connect the cape line in to the earphone output of an old >>>>>> cellphone through a male male jack cable (I saw in some forums that the >>>>>> line level is similar to the earphone output of some appliances, apart >>>>>> from the impedance difference.). Unfortunately, it didn't work. >>>>>> >>>>>> The interesting thing is that when the cable is connected to the cape >>>>>> audio input and the other connector is unplluged, I can hear the noise >>>>>> from static, similar to an unplugged to the amplifier electric guitar . >>>>>> >>>>>> Can someone suggest me a simple form to test the audio input? >>>>> >>>>> I don't have the Audio Cape, but I do have a TLV320AIC3106EVM connected >>>>> to my BBB and it works fine. You may want to try the following command: >>>>> >>>>> arecord -r 44100 -c 1 -f S16_LE -t wav -vv -d 25 example.wav >>>>> >>>>> This will show you a bar graph in the terminal so you can see the input >>>>> levels. I would just connect the output from you phone to the line input >>>>> of your audio cape. In another terminal, run amixer to adjust the input >>>>> levels. >>>>> >>>>> Regards, >>>>> John >>>>> >>>>> Regards. >>>>> -- >>>>> 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 [email protected]. >>>>> For more options, visit https://groups.google.com/d/optout. >>>> -- >>>> 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 [email protected]. >>>> For more options, visit https://groups.google.com/d/optout. >>> >>> >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "BeagleBoard" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/beagleboard/tQpS9jL97iI/unsubscribe. >>> To unsubscribe from this group and all its topics, send an email to >>> [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >> >> >> -- >> 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 [email protected]. >> For more options, visit https://groups.google.com/d/optout. > > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the Google > Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/tQpS9jL97iI/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. -- 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
