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 > > > > ??? > > > > 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 [email protected]<javascript:>. > > > >>> > > > >>>> 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 a > > > >>> topic in > > > >>> > > the > > > >>> > > > >>> Google Groups "BeagleBoard" group. > > > >>> > > > >>> To unsubscribe from this topic, visit > > > >>> > > > >>> > > > >>> > > > > > >>> > > https://groups.google.com/d/topic/beagleboard/spmJODUYSp0/unsubscribe. > > > >>> > > > >>> To unsubscribe from this group and all its topics, send an > > > >>> email to > > > >>> > > > >>> [email protected] <javascript:>. > > > >>> > > > >>> > > > >>> > > > >>> For more options, visit > > > >>> 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] <javascript:>. > > > >>> > > > >> For more options, visit > > > >>> https://groups.google.com/groups/opt_out. > > > >>> > > > >> > > > >>> > > > > > > > >>> > > > > > > > >>> > > > > > > > >>> > > > > -- > > > >>> > > > > LinkedIn - 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