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This sound is a 1-sample long impulse at 48 kHz.
It covers the whole frequency range with equal power.
This is a perfect sample for exciting your guitar amp or reverb unit to capture it's impulse response (IR). You can also play it through a speaker in a reverbant room to capture it's reverb characteristics. Remember that the IR sample will be no flatter than your speaker's performance multiplied by your microphone's performance (frequency response characteristics).
The sample has exaclty 1 second of silence, then the impulse, then another second of silence to ensure the impulse will be played clean and untruncated on any sound system or device.
My test with IR LV2 convolution plugin have proven, that this sample has absolutely flat frequency response - convolved signal was identical to the source signal. After normalization and sample-alignment of the sound clips I have inverted the polarisatin of one of them and summed them - result was absolute silence, even no hiss was present as a result. This shows the accuracy of the convolution process and proves this sound to be perfect for sampling IR.
The impusle was generated with C* Dirac LADSPA plugin.
Created using Audacity.
Type
Wave (.wav)
Duration
0:02.000
File size
187.6 KB
Sample rate
48000.0 Hz
Bit depth
16 bit
Channels
Mono
6 years, 11 months ago
I had another Dirac spike I found on the web, (a whole package in differing bit and samples rates) but I noticed they weren't appearing as a single sample spike after I imported and zoomed in with Logic, but instead appeared as a spike followed by a small envelope of about 8 more waves, quickly diminishing in magnitude.
So, I downloaded yours and was surprised to see something even stranger. Yours has the spike in the center of a cluster of waves, the the buildup hitting the spike in the center, then the similar type of release characteristic described with that other spike (described above). The pre and post waves are in perfect symmetry with yours. Curious to know what I'm seeing and why Logic is rendering this way, does anybody know?
Is this some sort of "pre-ringing" artifact? What's causing it?
7 years, 1 month ago
thank's alot! had to cut it to make the latency better.
7 years, 6 months ago
Such a simple thing and so hard to find. LOL. Thanks so much!
8 years, 5 months ago
Thank you!
10 years ago
Thanks, it was really hard to find :)