14 Oct
2005
14 Oct
'05
2:23 p.m.
thank you,too some software ideas i already got. this would be using
jaaa with jack.
compilation is a bit tricky but i got it installed now - well it doesnt
work,but its looks like it should =) so i guess my jack config is still
faulty.thanks for the info mics - as with the opensource software i can
now go and spend my money on a nice measurement microphone and then give
them something for their nice proggi,if i get it to work =). i guess i
wont be able to afford a 900 bucks mic for a start but, i guess 500
will me a must. as a sound card i use an audigy zs pl/pro,i know i
know,a "windows-card" ,but as far as now i have made pretty good
experience with it since latest alsa,much bang for the buck-of course id
prefer the rme- but i guess so far my
questions have been answered: i will go with my soundcar,buy a nice
mic,and use the opensource solution andrew suggested.
thank you 2 very much so far. i will no go on fighting my jackd,to get
the jaaa running.btw i tried to compile it against my 64bit sys,the
clbla libraries it needs too - maybe that is why it wont work yet,as jaa
shows up in my qjackctl. but qjackctl still isnt able to set for example
hw:0.4 to 8channel 96khz capture-which it should,and some similar
nastyness when dealing with channels of hw:0.4 (the hd-device).maybe mr.
gaydenko has some idea here to =).
mfg
sonicx
Phil Mendelsohn wrote:
From: sonicx
<sonicx_(a)gmx.net>
i was wondering if it is possible,and usuable, to
make precise pressure
and frequency messurements using linux. ie. to test high-end speakers.i
somehow guess so,but what do i need? can i use my
mic+soundcard+alsa+somemeasurementproggi ?
This sort of measurement is as much of an art as a science; if I were you
and wanted to get pretty serious about it, I'd look into measurement mics
before I got too hung up on the software. Earthworks M30BX is about $900,
but there are some less expensive solutions. A Shure SM-81, while not
strictly a measurement mic, will work pretty well in lots of cases. I
haven't seen them used for much less that $400 lately. :(
You want the measurement mic to be the best thing in the chain -- a good
mic on a cheap soundcard is better than a great soundcard with a poor mic.
As to software, I don't know about preset solutions -- sorry. If you
really want to get into it, fftw, gnuplot, and octave are all tools for
rolling your own -- and it's a great way to really learn what you're
doing.
But be careful -- when your ears and your measurements disagree, go with
your ears.
Phil Mendelsohn
(former mastering engineer, AES member, and audio boffin.)