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Re: wireless synchronization of multiple recorders

Subject: Re: wireless synchronization of multiple recorders
From: "Allen Cobb" ashtangakasha
Date: Thu Nov 2, 2006 8:11 am (PST)
If you need sample-accurate timestamps, you might consider a
low-cost GPS receiver (bare boards are available from
electronics suppliers), and some can output text time-info. The
GPS system relies on sub-nanosecond accuracy, so you could get
wildly accurate time info from anywhere on earth. The interface
to your audio recorder, of course, would have to be designed
from scratch. I'd suggest a system of beep tones. In any case,
the GPS stamp would be far more accurate than the digital clock
on the recorder. It probably wouldn't be too hard to find an EE
who could build you something, but it would depend a lot on your


Allen Cobb

-----Original Message-----
 Behalf Of Gianni
Sent: Thursday, November 02, 2006 4:23 AM
Subject: [Nature Recordists] wireless synchronization of

dear all,
        I'm working on a monitoring project based on multiple recorders
distributed in a wide area. Recorders could be stand-alone
or pc-based recorders. In both case we would have recordings
timestamped with great accuracy, possibly at sample level, and
exactly the same sampling clock, to be correctly inserted in a
"timeline"; great accuracy is for example required to measure
among a same sound received by multiple receivers.

My question is if there are wireless systems able to distribute
master clock to all recorders or to all sound boards installed
in PCs.

Looking forward to your replies,
Gianni Pavan
Centro Interdisciplinare di Bioacustica e Ricerche Ambientali
Universita' degli Studi di Pavia
Via Taramelli 24, 27100 PAVIA, ITALIA
Tel         +39-0382-987874
Fax        +39-02-700-32921

"Microphones are not ears,
Loudspeakers are not birds,
A listening room is not nature."
Klas Strandberg
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