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 SIR1 by SIR Audio Tools is a Virtual Effect Audio Plugin for Windows. It functions as a VST Plugin.
Product SIR1
Developer SIR Audio Tools
Price (MSRP) Free
Type / Tags
Plug-in, App & Soundware Format(s)
Operating System Availability
Download Released
 1.0.11  Downloads Released
Supported Sample Formats (loads or saves) include
Miscellaneous Information
Copy ProtectionNone

SIR1 is a reverb device that works with "impulse-responses". Impulse-responses are generated by recording short, broadband signals and their corresponding room-reflections, and by cutting out the initial signal. What is left contains the information needed to reproduce the same room with other signals.


  • Works with a fixed latency of 8960 samples (possibly compensated by VST-Host).
  • You can adjust predelay, attack-time, length and stereo width of the impulse response.
  • Stretch (up & downsampling of impulse response).
  • FFT EQ (to adjust the frequency spectrum of the impulse-response).
  • Auto Gain (automatic volume compensation).
  • Dynamic CPU Consumption (use only the CPU power that is needed to get the result).
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Average user rating of 9.00 from 4 reviews

SIR Audio Tools
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