Spectrogram

7 replies [Last post]
SK
User offline. Last seen 6 years 49 weeks ago. Offline
Joined: 2007-01-23
Posts:

Hi,

something that ardour is missing imho is a spectral view instead of lin/log waveforms. If done right it would provide an useful tool to quickly identify pieces of sound. An additional spectrometer in a own window would be useful to identify problematic frequency ranges.

So the question is what's the plan with ardour. Are such tools already in the queue, does it sound interesting or are there objections against it?

BenLoftis
User offline. Last seen 1 week 6 days ago. Offline
Joined: 2006-03-27
Posts:

There is a pretty nice spectrogram view that shows multiple, color-coded FFT views on the same scale so that you can compare the spectrum of different tracks.

To use it, press 'r' (for the range tool), sweep across a range of audio, optionally select some more tracks to have the range cover those tracks as well, and then right-click on the range and choose "Analyze Range" in the menu.

This is an optional feature and I'm not sure if it's enabled in the OSX download.

-Ben Loftis

SK
User offline. Last seen 6 years 49 weeks ago. Offline
Joined: 2007-01-23
Posts:

Yes, it's an not selected option in CVS. I'll look at it after recompile :)

---

Ok, i see, it's a spectrogram, essentially what i meant to be in the extra window. Essentially this is similar to baudline (http://baudline.com) with the averaging. If you don't know that program take some time to play with it because it is very good at analysing audio with the FFT.

In the spectrum of ardour the Y-scale is missing.
One addition to make is replacing the single FFT with cascaded multirate FFTs. Then the resolution in the lower frequencies would still be good.

The other thing i mean is the spectrogram like in audacity instead of the waveform.

unfa
unfa's picture
User offline. Last seen 1 day 16 hours ago. Offline
Joined: 2009-10-19
Posts:

Oh I miss the spectrogram and live spectral analysis in Ardour. Maybe there's a LV2 plugin that can do that?

Smeefer
User offline. Last seen 8 weeks 1 day ago. Offline
Joined: 2011-05-11
Posts:

Yeah as far as I currently know, there are 2 analysis LV2 plugins for observing the frequency range on any track while it's playing: Calf Analyzer and Invada Meter. Are those the same as a "spectrogram"? I'm not entirely sure, but give them a try...

I think it would be great to have a 12 to 30 band EQ/Compression LV2 (or an internal Ardour tool) that displayed the live frequency spectrum, just like JAMin. But there is JAMin, so I don't think that feature is needed, but it would be really awesome to have inside Ardour...

LeatusPenguin
User offline. Last seen 2 days 2 hours ago. Offline
Joined: 2010-12-16
Posts:

Another plugin that might be worth your while checking out is Robin's 30 Band 1/3 octave spectrum analyzer. You can find it here -

https://github.com/x42/meters.lv2

Screenshot is on the bottom left of the page. Some other very useful meters in that bundle too.

calimerox
calimerox's picture
User offline. Last seen 13 hours 19 min ago. Offline
Joined: 2007-10-19
Posts:

also, baudline can be plugged in via jack, it still has the "problem" of not showing a logarithmic scale as I remember... I use the calf analyser on a daily basis and it works great for me

LeatusPenguin
User offline. Last seen 2 days 2 hours ago. Offline
Joined: 2010-12-16
Posts:

I think it would be great to have a 12 to 30 band EQ/Compression LV2 (or an internal Ardour tool) that displayed the live frequency spectrum

You could try the calf plugins from git. They have now added an analyser to all their eq's that you can enable or disable.