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SIR1 has an average user rating of 4.25 from 4 reviews

Rate & Review SIR1

User Reviews by KVR Members for SIR1


Reviewed By benwalker [all]
April 12th, 2004
Version reviewed: on Windows

Reverb is one of those things, along with a compressor, that's used all over the place - which kind of means you need to find a really good one, or have lots for different jobs...

... and so enter SIR. I'll spare the science bit, suffice to say that it doesn't have a sound or characteristic of its own, but rather borrows reverb tails from 'real' effects, rooms, cabinets etc. The upshot of this is that you can add the reverb from a £11k Lexicon, to your sampled/recorded drum track. Brilliant! Impulse reverbs are getting more common now, so there are loads of useable impulses out there on the web, or of course you can always make your own.

Interface - Basic but effective.

Sound - Depends on the impulse. 0/10 for that badly recorded impulse of my bathroom, 10/10 for the 960L, Eclipse, TC 6000 etc...

Features - Not as many knobs as say, Ambience, but then again it doesn't really need it. no damping or anything like that but the EQ is powerful, and the reverb tail can be cut, stretched and so on, so some great sounds can be easily produced.

Documentation - Doesn't really need it. Simple idea and it's easy to use.

Presets - None. But that's kind of the point. I'm giving it 9 because at least the SIR page has links to some impulse hosting sites. Be warned that these impulses can be big...

Customer Support - haven't had to deal with them, but since it seems to be a one-man operation, would expect support to be good.

VFM - No question, it's free...

Stability - Never crashed yet.

Make sure your host has full PDC, and run as a SEND effect. Either that, or only use it when mastering and use a lower latency/CPU reverb for recording. But come on... it's free. It loads top quality impulse responses. Works well and deserves a space on your hard-drive :D you won't be disappointed.
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Comments & Discussion for SIR Audio Tools SIR1

Discussion: Active
9 February 2017 at 11:00pm

Now, this may well be just me not being very knowable, but - how is "fixed latency" a feature? To me, it seems like a bug.

26 April 2017 at 2:47am

This appears to be no longer available. The link redirects to siraudiotools' products page, where you can buy SIR2. There is no entry for (free) SIR1.

@Thohi It's too slow to calculate convolution without latency. The only way to do it without latency is fully in the time domain, where each sample of output requires /n/ multiply-and-add operations (/n/ being the size of the convolution kernel). It's actually faster to FFT the input, multiply by the IR spectrum, and IFFT to get the output... but you have to collect an entire FFT frame's worth of audio before you can do that, hence the latency.

26 April 2017 at 6:33am

The link is now hidden... but remains available. It is this one:



26 April 2017 at 3:26pm

How then do the other IR reverb plugins do it with little to no latency?

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