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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 RockMaestro [all]
January 27th, 2004
Version reviewed: on Windows

When I want reverb, I think SIR. I’ve practically stopped using any of my other reverb plugins.

SIR is a convoluting reverb. Basically, what happens is someone ‘samples’ a room, or a piece of gear and SIR will apply that tonal response and trail onto other material. So someone makes a reverb ‘impulse’ of a room and SIR will let you put your music in that room.

In addition to simulating rooms, SIR can load impulses of Guitar cabinets, non-linear gear, and other non-reverb things, and it can make your music sound like it’s been through these things. SIR will not produce distortion, so if someone makes an impulse of a guitar amp, it won’t sound distorted, it will merely have the *tonal* response of the amp.

So basically SIR has no sound of it’s own. I put the “Sound” assessment at 10 because I’m judging with my set of impulses.

As for features, it can do most of what I would want it to, although I’d like to see the ability to have negative predelay – basically start the impulse later, so as to cut off predelay in the impulse. Other than that, it’s pretty good for basic applications.

The documentation was enough, but it’s not really a full manual. That said, I didn’t really need one.

It doesn’t come with any presets – there are 2 you can download on the author’s page. Get impulses here http://www.noisevault.com . That’s the best source of real rooms, sampled hardware reverbs, and other gear.

Customer support – well there is none. But it isn’t needed, I’ve had no problems with this plugin. Stability is good, and that’s Cakewalk Home Studio 2002 with DirectiXer 2.5.

VFM – it’s free so it gets 10, no matter what.

It *is* a CPU hog, and it does introduce some latency into the system, but it’s well worth it.

I love this plugin, it’s part of the RockMaestro Cannon of free plugins.
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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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