Step by step guide – Sine sweep – Windows

create Impulse response, How to create/record an Impulse Response
Step by step guide.

What you need:

Step 1 – Start up your D.A.W

create Impulse response, How to create/record an Impulse Response
Open DAW and create several Audio Tracks

(D.A.W stands for Digital audio workstation)
Examples:

Step 2 – Lead track 1 through rig

create Impulse response, How to create/record an Impulse Response

First Audio Track is used for sending the signal through my rig. No input needs to be selected here,  Just select the output going into the rig.

Step 3 – Set track to record from microphone

create Impulse response, How to create/record an Impulse Response

Secondary Audio Track(s) is used for recording the signal coming out of the rig, Select the input for the corresponding microphone(s), Output on these channels are not necessary.

 

Step 4 – Place sweep on track 1

create Impulse response, How to create/record an Impulse Response

On the first Audio Track i place a sample consisting of the Frequency Sweep, You can download the sample here.

 

Step 5 – Arm and record

create Impulse response, How to create/record an Impulse Response

Ready all secondary Audio tracks with inputs for recording, Make sure that you Record at least 1 sample length more than the length of the Frequency Sweep to capture the ending clearly and record the Sample going through your Rig.

 

Step 6 – remove silence

create Impulse response, How to create/record an Impulse Response

Trim any unnecessary silent beginning of the recorded Audio, so that you have the recorded Frequency Sweep at the start of the recorded audio file.

 

Step 7 – Open Voxengo deconvolver
Step 8 – Select test tone file

create Impulse response, How to create/record an Impulse Response

Choose Original Frequency Sweep as reference

Step 9 – Select file to process

create Impulse response, How to create/record an Impulse Response

Choose Recorded Frequency Sweep as recording.

Step 10 – Deconvolve

create Impulse response, How to create/record an Impulse Response

Save/Convert resulting in finished Impulse Response with added _dc in the name in .WAV format.

  • Reversed technique is used with sweeps test tones created with fade-in and fade-out
  • MP Transform enables minimum-phase transform that takes place after deconvolution (Removes pre-echo)

  • Normalize to -0.3 dBFS enables automatic normalization of created impulses to -0.3 dBFS level.

How to record an
impulse response

Sine sweep method
Mac

Noise burst method
Any OS

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