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Re: New Ultrasonic USB microphone

Subject: Re: New Ultrasonic USB microphone
From: "Pelix" ipelicella
Date: Sat Apr 2, 2011 11:19 am ((PDT))
> Looks quite interesting, specially the sensible price.
>
> What is the self noise of the MEMS mic?
>
> Can you connect multiple ULTRAMIC200K's and record so they are *ALL* sync=
hronized?

I think that the best way to understand the quality of Ultramic is to see t=
he recordings, I hope to put some file in my website soon.
you can connect many Ultramic at the same Pc, they are seen like standard m=
icrophone with higher sample rate but the sync is dictated by USB protocol:
Pc ask informations to every single microphone every millisecond and every =
microphone send a buffer of 200 sample stored in RAM. So you could have a d=
ifference of less or more 200 sample between different microphone.
I'm working on a simultaneous multi sampler able to sample AT THE SAME TIME=
 on 4 channels at 400 ksample per second for each channel or 2 channel at 8=
00 ksps, but there's still a lot of work to do.
In this case I must use a non standard transfer protocol via USB so it coul=
d be only windows compatible.
Ivano







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