Re: FID sounds

Graham Barlow (gkb1@bohr.york.ac.uk)
Fri, 30 Aug 1996 17:34:30 +0100

On Aug 24, 9:25pm, Walter Bauer wrote:
> Subject: FID sounds
>
>
> Dear BUMers:
>
> some of you may recall that soon after the commercial introduction of
> FT-NMR in the early seventies it was possible to do an auditory exami-
> nation of FIDs. Unfortunately, these facilities virtually became out
> of fashion.

Walter has created a well written and interesting article. Can I sugget that
if anyone wants to listen to their NMR data as stored on disk (not real time as
Walter does) using their silicon graphics computer then you don't need any
extra hardware or software tools.

For data from my bruker amx500 you I create a sound file from an FID by typing
on one line:

sfconvert /u/data/user/nmr/file/1/fid /tmp/fid.aiff -inputraw channels 2
integer 32 2scomp end format aiff

and from a spectrum by typing:

sfconvert /u/data/user/nmr/file/1/pdata/1/1r /tmp/spc.aiff -inputraw channels 1
integer 32 2scomp end format aiff

The best thing I fouund to examine the 'music' with is the soundeditor program,
you could type:

soundeditor /tmp/fid.aiff or sounditor /tmp/spc.aiff

You should see your FID or spectrum in the soundeditor window, from which you
can 'play' the data, if you don't see your data you might want to use the
soundeditor controls normalise the amplitude by clicking on the [ALL] button
and selecting Level-Normalise from the menu. You could also change the pitch
to listen to the sounds at a more comfortable frequency.

If you want to be alone in the lab why not play your latest 4k x 4k HMQC
spectrum at full volume - well it is Friday afternoon...

Have fun,

Graham

-- 

/ Dr. Graham Barlow, NMR Service Manager \ / gkb1@york.ac.uk \ [ Dept. of Chemistry, Univ. of York, York, UK ][ Tel: 01904 432506 ] [ http://www.york.ac.uk/depts/chem/nmr ][ Mobile: 0402 181253 ] \ http://www.york.ac.uk/~gkb1/ / \ Fax: 01904 432516 /