Priyank: what do you mean by "highlighted portion"? you can check check of the audio cape in here http://beagleboardtoys.info/index.php?title=BeagleBone_Audio Maxim: cool, wanna see that mod :)
On Tue, Oct 1, 2013 at 2:24 AM, Maxim Podbereznyy <[email protected]>wrote: > 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 - 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