[LAU] JACK (or LADSPA or LV2) spectrum analyzer?

[Jörn Nettingsmeier]

On 04/03/2010 08:16 PM, drew Roberts wrote:
> On Friday 02 April 2010 07:48:39 Arnold Krille wrote:
>> On Friday 02 April 2010 03:30:22 Ken Restivo wrote:
>>> I'm mixing away, and at times I want to LOOK at the spectrum of a sound--
>>>  my ears are not yet well-developed enough for me to say "oh, that lump
>>> is at about 420Hz, and there's another at 3172Hz...", and sitting here
>>> sweeping with a parametric EQ seems prone to inaccuracy.
>>
>> But sweeping through frequencies with the parametric is probably the only
>> way to learn it. Looking at a spectrum analyser is fun but it teaches your
>> eyes, not your ears.
>> And I think most people want music for their ears, not music for the
>> eyes...
>>
>>> Is there a LADSPA or LV2 spectrum analyzer, similar to the one that's in
>>>  JAMIN? And/or, is there a standalone JACK spectrum analyzer-- less
>>>  heavyweight than JAMIN-- that I could use as a client, and just patch it
>>>  in and out of tracks to view them?
>>
>> japa is great. You can even use it to set up the pa. For that it has pink
>> and white noise generators built in... But you have to be aware of the
>> bass- changing effect of the update-interval...
> 
> What are the implications of setting up with an empty room and playing to a 
> full room?

it won't sound right :) but that's why there's a guy at the mixer who
doesn't double as barman after soundcheck (shit, have i been giving
venue owners an idea?).

use the analyser to find feedback and really bad room nodes, but don't
try to "flatten" that curve you see. that way lies stuttering, drooling
madness.

but if you can, keep that measurement microphone and japa around during
the gig, it will help you to pinpoint problems quickly. if you need to
do the monitors from f.o.h., rely on your ears for the house sound and
put the measurement mike on stage, so you see if anything starts ringing...