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]> 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]> [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] wrote: > > > > > > 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 - 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] <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]. > > 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]. > 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. 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