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Discussion Groups | Analog Devices DSPs | Audio Connectios for BF537 EZKit Lite board

Technical discussions related to Analog Devices DSPs (including Blackfin, TigerSHARC, SHARC and ADSP-21xx DSPs).

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Audio Connectios for BF537 EZKit Lite board - isni...@gmail.com - Aug 22 8:50:24 2008

Hello Everyone,
           I am developing an Audio application project on ADSP Bf537 EZ-LITE board. I have
developed compression and decompression algorithms for the Audio samples. The algorithm is
working fine and I have tested it.
           Now I want to achieve live recording and  output the recorded samples at the
speaker/headphone connected at "LINE_OUT" port of the board. I have a Mike from
"Zebronic", which I will connect to "LINE In" port of the board by the
Audio Connector. The "LINE IN" port of the board does not provide power to the mike,
so I am connecting the Mike Output parallelly  to the "Mic" port in the PC which
provides the power to the mike.
           Hence with the setup as described, "Mic" port of PC will drive the Mike
and Audio signal from the mike is sent via a "Audio  Connector"  to the  " LINE
IN"  port of the Board. I will record the Audio samples and play it from the "LINE
OUT" port of the board.

Now I have the following queries.

   1. Can I connect the "Mic"port of the PC  to the board via an Audio Connector??
Will it cause any damage to the port pins of the board??.
   2. Is there any other option through which I can achieve the goal??

Regards,
Nithin K S

------------------------------------

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Re: Audio Connectios for BF537 EZKit Lite board - Mike Rosing - Aug 22 17:55:47 2008

Howdy Nithin,

I used a microphone pre-amp to get a 1 Volt 20 mA drive for
an experiment long ago.  Check the specs on the audio input
and compare that to your mic signal output.  I would think
that either a direct connection will work or use of a pre-amp
will make the direct plug in very easy.

Patience, persistence, truth,
Dr. mike

On Fri, 22 Aug 2008 i...@gmail.com wrote:

> Hello Everyone,
>            I am developing an Audio application project on ADSP Bf537 EZ-LITE board. I
have developed compression and decompression algorithms for the Audio samples. The algorithm is
working fine and I have tested it.
>            Now I want to achieve live recording and  output the recorded samples at the
speaker/headphone connected at "LINE_OUT" port of the board. I have a Mike from
"Zebronic", which I will connect to "LINE In" port of the board by the
Audio Connector. The "LINE IN" port of the board does not provide power to the mike,
so I am connecting the Mike Output parallelly  to the "Mic" port in the PC which
provides the power to the mike.
>            Hence with the setup as described, "Mic" port of PC will drive the
Mike and Audio signal from the mike is sent via a "Audio  Connector"  to the  "
LINE IN"  port of the Board. I will record the Audio samples and play it from the
"LINE OUT" port of the board.
>
> Now I have the following queries.
>
>    1. Can I connect the "Mic"port of the PC  to the board via an Audio
Connector?? Will it cause any damage to the port pins of the board??.
>    2. Is there any other option through which I can achieve the goal??
>
> Regards,
> Nithin K S
>

------------------------------------

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New Year Gift for Members of DSPRelated.com.  Details here.