[iyonix-support] Re: Voice recording
- From: tennant@xxxxxxxxxxxxxxxxx (Tennant Stuart)
- To: iyonix-support@xxxxxxxxxxxxx
- Date: Mon, 18 Jun 2007 18:44:17 +0100
Richard/Charles/Dave wrote:
>> > I've been playing around with AudioIn, Christian Ludlam's Audio
>> > recorder. I connected a "Dynamic mic" to the Mic socket at the
>> > rear of the Aria and began recording my voice. I dragged the
>> > resultant WAV file over WavEdit but no sound was output. The
>> > program records/samples data correctly from the internal CDROM.
>> > Could this be due to the wrong type of microphone? None of the
>> > input and outputs are muted in the Sound configuration.
>
>> The Iyonix's mic input is a bit of a misnomer. It isn't sensitive
>> enough to record directly from a microphone at proper levels.
>
>> Also, there may be another problem, depending on the type of mic
>> you have: some mics expect to receive power from the host to work
>> an inbuilt preamplifier. The Iyonix doesn't provide power. Such
>> microphones would therefore appear to provide no signal at all.
>
> Dynamic Mics shouldn't need external power but they do have fairly low
> level output. An electret, with internal battery, should work.
What's an electret?
>As you stated the gain required is quite high.
>
>Anyone interested - perform this check:
>Connect the output of an amplifier to the Iyonix/Aria "Audio-in"
>socket. Switch or connect amplifier to any source (CD, radio or mic)
>and set the gain so that it is audible through the internal speaker.
>
>*************************************
>Warning - be careful not to set the gain too high - as this may destroy
>the audio circuitry on the motherboard. I am sure that protection is
>built in but hey - lets not take chances!
>*************************************
>
>The application - AudioIn can then record the source (source set to
>line in) and save it as a WAV file.
Is there a little application somewhere that mimics a VU meter, so you don't
have to drag resultant WAV files over WavEdit to check if sound was input?
Tennant Stuart
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