Audio cape can be easily modified to enable MIC BIAS. You will need two resistors 1k and a soldering tool. I've sent to this list a picture how to modify it, can do it again
2013/10/1 Priyank Patel <[email protected]> > Hi Meimo, > I just finished flashing my BBB to production image 2013.09.04 of > Angstrom. But, now I am more interested in installing lightweight distros > like gentoo or puppy linux. Preferably Gentoo (It gives inner satisfaction > knowing someone else is also having same setup as yours). And please do > send me the Awesome "Robert Nelson" kernel BBB patches. I will start > working on it right away. Also, we will wait till you get answer from > adafruit. > Keep fingers crossed :) > Priyank. > > > On Tuesday, October 1, 2013 2:11:39 AM UTC-4, [email protected] wrote: > >> Hi Priyank, >> >> :) >> Just some minutes ago I posted a question on the Adafruit support >> forum (I bougth two of those mic+amps for interfacing with my audio >> cape) asking what is the best way to inerface those mic+amps with the >> audio cape. >> >> As soon as I will get an answer from Adafruit, I will post it to you. >> >> One thing I forgot(?) to mention: >> To use the audio cape with the BBB you need to modify the kernel and >> the devicetree and recompile it. If you want, I will send you the >> needed patches based on Robert Nelsons BBB kernel (3.8.12), which are >> only tested for my setup but are not specific for it (I think). I am >> running Gentoo and NOT Angstrom! >> >> I think (but let us wait for the answer on Adafruits support forum) >> that the output level of the mic+amp is powerful enough to drive the >> audio input of the Audio cape. >> >> Best regards, >> mcc >> >> >> >> Priyank Patel <[email protected]> [13-10-01 07:56]: >> > Hi Meino, >> > I have looked up both directional and unidirectional adafruit has to >> offer. >> > The unidirectional microphone seems to be partially helping as the >> website >> > says it is ideal for the distance of 6" from the sound source (this is >> > hearing aid and the sound source can be far or near) .Besides that, >> other >> > concern is how would I interface it with the Audio cape (If I purchased >> > one). This query was produced as I do not see a mic-in audio jack. >> Please, >> > suggest me what can be steps that can be taken further. Thanks for >> > researching on my behalf. You guys are helping a lot. Much obliged. >> > Priyank. >> > >> > >> > On Tue, Oct 1, 2013 at 12:15 AM, <[email protected]> wrote: >> > >> > > Hi Priyank, >> > > >> > > hope that this could be helpful?!: >> > > http://www.adafruit.com/**products/1063<http://www.adafruit.com/products/1063> >> > > >> > > ??? >> > > >> > > Best regards, >> > > mcc >> > > >> > > >> > > >> > > >> > > Priyank Patel <[email protected]> [13-10-01 06:00]: >> > > > Hi Pedro, >> > > > I reviewed the Audio Cape IC specification file. The IC does have >> > > powerful >> > > > ADC and DAC along with support for features that I require for the >> > > project. >> > > > Here, I posted a snapshot of what I found related to the topic >> being >> > > > discussed. Full version is available at: >> www.ti.com/lit/ds/symlink/* >> > > > tlv320aic3106*.pdf >> > > > I do not understand some of the highlighted portion. Please, see if >> its >> > > the >> > > > same what you mentioned in your earlier reply. >> > > > Thanks. >> > > > Priyank. >> > > > On Monday, September 30, 2013 11:40:32 PM UTC-4, Peedro A. Melendez >> > > > (lazychino) wrote: >> > > > > >> > > > > the audio cape IC is really powerful but note some functions are >> > > > > restricted by the hardware, example no microphone support(mic >> bias no >> > > > > connected). Check the audio cape files to make sure it works for >> your >> > > > > application. >> > > > > -Pedro >> > > > > >> > > > > >> > > > > On Mon, Sep 30, 2013 at 11:36 PM, Pedro A. Melendez < >> > > [email protected]<javascript:**> >> > > > > > wrote: >> > > > > >> > > > >> I'm using SYBA usb audio dongle is 11 bucks and it works. It >> appears >> > > as a >> > > > >> second audio device if you dont disable the hdmi cape. >> > > > >> -Pedro >> > > > >> >> > > > >> >> > > > >> On Mon, Sep 30, 2013 at 11:32 PM, <[email protected]<javascript:>> >> > > wrote: >> > > > >> >> > > > >>> Hi Priyank, >> > > > >>> >> > > > >>> the audio cape will do the sampling for you. This will release >> > > > >>> a great processing burden from the shoulders of the CPU. The >> > > > >>> A/D-converter (analog to digital converter) of the audio cape >> > > > >>> will do this for you. >> > > > >>> In the simpliest case, you only need to grab the samples and >> put >> > > > >>> it on SD-card/disc (raw format). This means recording. In case >> > > > >>> of an hearing aid, this is not that useful, since you will >> "hear it >> > > > >>> later", hahahaha! :) >> > > > >>> Take a deep look into the datasheet of the tlv320aic3106, which >> is >> > > > >>> TIs audio processor they put on the audio cape. This little >> beast is >> > > > >>> capable of much more than simple sampling. For example you will >> get >> > > > >>> a maximum sampling rate of 96 kHz, which means -- capable >> microphones >> > > > >>> provided -- you can sample sound up to 24 kHz. >> > > > >>> One thing: I dont know, how much of the features of this chip >> are >> > > > >>> build into the driver! Means: May be you will need to hack the >> kernel >> > > > >>> driver a little or a little more... ;) But as there is a driver >> > > > >>> already there this will not be THAT complicated. >> > > > >>> To get the cape running with the BBB is a little tricky (driver >> > > > >>> selection in the kernel (you use Robert Nelsons fantastic >> kernel?)) >> > > > >>> and you need to disable HDMI and eMMC as far as I know. >> > > > >>> But it will definetly run with the BBB after some tweaking (or >> in >> > > > >>> other words: I have a BBB and an AUDIO cape and a LCD7 cape >> (A2) >> > > > >>> running together nicely after some hacking of the device tree). >> > > > >>> >> > > > >>> HTH! >> > > > >>> Best regards, >> > > > >>> mcc >> > > > >>> >> > > > >>> >> > > > >>> >> > > > >>> Priyank Patel <[email protected] <javascript:>> [13-10-01 >> 05:12]: >> > > > >>> > Thanks for the quick reply. I will be sure to get the audio >> cape. >> > > After >> > > > >>> > getting the audio cape, I suppose, I need to capture the mic >> input >> > > and >> > > > >>> > sample it (I think ALSA does that?). Further, I will need to >> > > implement >> > > > >>> DSP >> > > > >>> > algorithms. I researched on that and found the OMAP built >> into the >> > > > >>> > beagleboard (Here I refer to the original beagleboard) has >> the >> > > ability >> > > > >>> to >> > > > >>> > do DSP functions via Gstreamer tweaking (gst-dsp project). I >> am >> > > > >>> wondering >> > > > >>> > if there is similar OMAP processor built into beaglebone >> black >> > > (which >> > > > >>> I am >> > > > >>> > using for my project). Please, let me know how-to deploy dsp >> > > function >> > > > >>> on >> > > > >>> > BBLK. Thanks. :) >> > > > >>> > Priyank. >> > > > >>> > >> > > > >>> > On Monday, September 30, 2013 10:53:17 PM UTC-4, >> > > [email protected]: >> > > > >>> > > >> > > > >>> > > Hi Priyank, >> > > > >>> > > >> > > > >>> > > two things to consider: >> > > > >>> > > For me "hearing aid" implies to increase the volume of a >> audio >> > > > >>> > > signal. But you cannot process signals, which do not arrive >> at >> > > the >> > > > >>> > > A/D-converter. >> > > > >>> > > The cheap USB-Audio-Dongles have a no stereo mic inout. It >> is >> > > only >> > > > >>> > > mono (or in other words: All USB-dongles I looked for, have >> a >> > > mono >> > > > >>> > > input...I didnt find any dongle with a stereo input). A >> hearing >> > > > >>> > > aid which feeds the same signal to both ears (mono) will >> destroy >> > > > >>> > > the human ability to locate sounds. While crossing over >> roads >> > > (for >> > > > >>> > > example) >> > > > >>> > > without being able to locate a sound could be fatal... ;) >> > > > >>> > > Furthermore it may be possible, that the input amplifier of >> such >> > > > >>> > > dongles isn't powerful enough to amplify a mic's signal. >> May be >> > > the >> > > > >>> > > advertising of such dongles confuses "Line In" with "Mic >> In" for >> > > > >>> > > obvious reasons. >> > > > >>> > > >> > > > >>> > > >> > > > >>> > > Best regards, >> > > > >>> > > mcc >> > > > >>> > > >> > > > >>> > > >> > > > >>> > > >> > > > >>> > > Priyank Patel <[email protected] <javascript:>> >> [13-10-01 03 >> > > :59]: >> > > > >>> > > > Hello, >> > > > >>> > > > I was researching within the thread and found out that a >> USB >> > > audio >> > > > >>> > > dongle >> > > > >>> > > > might be a cheap alternative to buying a Audio cape. I >> just >> > > wanted >> > > > >>> to >> > > > >>> > > know >> > > > >>> > > > if it would work for my hearing aid application (i.e. to >> send >> > > an >> > > > >>> input >> > > > >>> > > to >> > > > >>> > > > beaglebone black and receiving it back via the same USB >> audio >> > > > >>> dongle) >> > > > >>> > > > p.s. I am not looking to get a very high quality sound, >> just >> > > need >> > > > >>> to >> > > > >>> > > make >> > > > >>> > > > it work. >> > > > >>> > > > Thanks in advance. >> > > > >>> > > > Priyank. >> > > > >>> > > > >> > > > >>> > > > On Monday, September 30, 2013 4:48:56 AM UTC-4, lisarden >> wrote: >> > > > >>> > > > > >> > > > >>> > > > > probably you should have a look at arecord sources to >> figure >> > > out >> > > > >>> how >> > > > >>> > > to >> > > > >>> > > > > capture samples from a sound card >> > > > >>> > > > > >> > > > >>> > > > > >> > > > >>> > > > > 2013/9/30 Priyank Patel <[email protected]<javascript:>> >> > > > >>> > > > > >> > > > >>> > > > >> Thanks for the suggestion. >> > > > >>> > > > >> Now as I stated earlier I m a beginner, I don't know >> where >> > > to >> > > > >>> start >> > > > >>> > > with >> > > > >>> > > > >> programming. I refer to the part where I need to >> sample the >> > > data >> > > > >>> > > coming >> > > > >>> > > > >> from a microphone and implement dsp algorithms. Please >> > > point me >> > > > >>> in >> > > > >>> > > right >> > > > >>> > > > >> direction or some references. Thanks again. >> > > > >>> > > > >> On Sep 30, 2013 3:43 AM, "Maxim Podbereznyy" < >> > > [email protected] >> > > > >>> <javascript:>> >> > > > >>> > > >> > > > >>> > > > >> wrote: >> > > > >>> > > > >> >> > > > >>> > > > >>> yes. It was discussed here already >> > > > >>> > > > >>> >> > > > >>> > > > >>> >> > > > >>> > > > >>> 2013/9/30 Priyank Patel >> > > > >>> > > > >>> <[email protected]<**javascript:>> >> >> > > > >>> > > > >>> >> > > > >>> > > > >>>> Is audio cape compatible with BBLK. I think I need >> to >> > > disable >> > > > >>> the >> > > > >>> > > hdmi >> > > > >>> > > > >>>> functionality in order to use the audio cape. >> > > > >>> > > > >>>> >> > > > >>> > > > >>>> -- >> > > > >>> > > > >>>> 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/**groups/opt_out<https://groups.google.com/groups/opt_out>. >> >> > > > >>> > > > >>>> >> > > > >>> > > > >>> >> > > > >>> > > > >>> >> > > > >>> > > > >>> >> > > > >>> > > > >>> -- >> > > > >>> > > > >>> LinkedIn - http://www.linkedin.com/in/** >> maximpodbereznyy <http://www.linkedin.com/in/maximpodbereznyy> >> > > > >>> > > > >>> Company - >> > > > >>> > > > >>> http://www.linkedin.com/**company/mentorel<http://www.linkedin.com/company/mentorel> >> > > > >>> > > > >>> Facebook - https://www.facebook.com/** >> mentorel.company <https://www.facebook.com/mentorel.company> >> > > > >>> > > > >>> >> > > > >>> > > > >>> -- >> > > > >>> > > > >>> 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/spmJODUYSp0/** >> unsubscribe<https://groups.google.com/d/topic/beagleboard/spmJODUYSp0/unsubscribe>. >> >> > > > >>> > > > >>> To unsubscribe from this group and all its topics, >> send an >> > > > >>> email to >> > > > >>> > > > >>> beagleboard...@googlegroups.**com <javascript:>. >> > > > >>> > > > >>> >> > > > >>> > > > >>> For more options, visit >> > > > >>> https://groups.google.com/**groups/opt_out<https://groups.google.com/groups/opt_out>. >> >> > > > >>> > > > >>> >> > > > >>> > > > >> -- >> > > > >>> > > > >> 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/**groups/opt_out<https://groups.google.com/groups/opt_out>. >> >> > > > >>> > > > >> >> > > > >>> > > > > >> > > > >>> > > > > >> > > > >>> > > > > >> > > > >>> > > > > -- >> > > > >>> > > > > LinkedIn - http://www.linkedin.com/in/** >> maximpodbereznyy <http://www.linkedin.com/in/maximpodbereznyy> >> > > > >>> > > > > Company - >> > > > >>> > > > > http://www.linkedin.com/**company/mentorel<http://www.linkedin.com/company/mentorel> >> > > > >>> > > > > Facebook - >> > > > >>> > > > > https://www.facebook.com/**mentorel.company<https://www.facebook.com/mentorel.company> >> > > > >>> > > > > >> > > > >>> > > > >> > > > >>> > > > -- >> > > > >>> > > > 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/**groups/opt_out<https://groups.google.com/groups/opt_out>. >> >> > > > >>> > > >> > > > >>> > > >> > > > >>> > >> > > > >>> > -- >> > > > >>> > 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/** >> groups/opt_out <https://groups.google.com/groups/opt_out>. >> > > > >>> >> > > > >>> -- >> > > > >>> 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/** >> groups/opt_out <https://groups.google.com/groups/opt_out>. >> > > > >>> >> > > > >> >> > > > >> >> > > > > >> > > > >> > > > -- >> > > > 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. >> > > > For more options, visit >> > > > https://groups.google.com/**groups/opt_out<https://groups.google.com/groups/opt_out>. >> >> > > >> > > >> > > >> > > -- >> > > 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/spmJODUYSp0/** >> unsubscribe<https://groups.google.com/d/topic/beagleboard/spmJODUYSp0/unsubscribe>. >> >> > > To unsubscribe from this group and all its topics, send an email to >> > > beagleboard...@**googlegroups.com. >> > > For more options, visit >> > > https://groups.google.com/**groups/opt_out<https://groups.google.com/groups/opt_out>. >> >> > > >> > >> > -- >> > 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. >> > For more options, visit >> > https://groups.google.com/**groups/opt_out<https://groups.google.com/groups/opt_out>. >> >> >> -- > 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/groups/opt_out. > -- LinkedIn - http://www.linkedin.com/in/maximpodbereznyy Company - http://www.linkedin.com/company/mentorel Facebook - https://www.facebook.com/mentorel.company -- 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/groups/opt_out.
