CB IR Forge — Synthetic impulse responses: rooms, plates, springs

Design

seed 1

Starting point

Preset

Shape

Length 3.2 s

Pre-delay 28 ms

Low ×1.35

Mid 2.6 s

High ×0.45

Fit length to decay

Mid is the real RT60. Low and high are multipliers of it — that's how rooms actually behave, and how you make a space sound warm or brittle. With fit on, the length follows the decay so the tail always reaches silence inside the file.

Low xover 250 Hz

High xover 3.5 kHz

Character

Density 70

Diffusion 55

Tone tilt -0.8 dB/oct

Width 95

Inharmonicity 60

Modulation 0

Dispersion 70

Early reflections

Include early reflections

Room size 34 m

ER level −9 dB

Envelope

Shape

Gate time 300 ms

Output

Sample rate

Bit depth

Seed

File name

Result

nothing built yet

Audition source

Audition output

Listing outputs asks for microphone permission — that's the only way a browser will name your audio devices. Nothing is recorded.

Energy decay across the spectrum

loud mid quiet below −70 dB

Waveform — L / R

Decay curve

measured RT60 —

length —

correlation L/R —

peak —

Export

Count

Vary

Batch builds the whole set and downloads each file in turn — your browser will ask once whether to allow multiple downloads. Files land as name_001.wav upward with the seed baked into the sequence, so any file in a batch is reproducible from its number.