Thank you summer, I will get one but i was hoping for a continuous sweep above 20 k,
the other question is how do you display the sweep? You mention a digital scope?
the other question is how do you display the sweep? You mention a digital scope?
The Impulse track #76 would require a digital scope that has an FFT. I think almost all digital scopes have an FFT. If you do not have that, you probably do not have an audio spectrum analyzer either.
There is an other track that has a 20 - 20kHz sweep. You can use any scope for that.
The CD does not have any frequencies above 1/2 of the CD sample rate of 44.1kHz. That would be 22.05kHz on the impulse, white noise, etc.
There is an other track that has a 20 - 20kHz sweep. You can use any scope for that.
The CD does not have any frequencies above 1/2 of the CD sample rate of 44.1kHz. That would be 22.05kHz on the impulse, white noise, etc.
A digital scope with FFT can be nice to have. I did for years without one, just used an analog scope. But then I got one.
I am attaching some screen shots of a digital scope FFT, tube amp, and the Denon Audio Technical CD .
0001 -42 dB 2nd harmonic distortion (0.8%). You can see the 3rd harmonic ~ -48 dB.
0005 3rd order Intermodulation distortion almost -46dB, 0.5%.
0007 The frequency response from below 100Hz to where the CD signal rolls off at 1/2 of the 44.1 sampling frequency. This is the impulse on the CD that i mentioned earlier.
And the results of a crossover filter for a midrange driver:
0011 The frequency response of a series LC at 4.2 kHz. Note the response drop off at low and at high frequencies. Only the midrange comes through.
I used the CD Impulse as the signal generator, and the FFT to get this screen shot.
I am attaching some screen shots of a digital scope FFT, tube amp, and the Denon Audio Technical CD .
0001 -42 dB 2nd harmonic distortion (0.8%). You can see the 3rd harmonic ~ -48 dB.
0005 3rd order Intermodulation distortion almost -46dB, 0.5%.
0007 The frequency response from below 100Hz to where the CD signal rolls off at 1/2 of the 44.1 sampling frequency. This is the impulse on the CD that i mentioned earlier.
And the results of a crossover filter for a midrange driver:
0011 The frequency response of a series LC at 4.2 kHz. Note the response drop off at low and at high frequencies. Only the midrange comes through.
I used the CD Impulse as the signal generator, and the FFT to get this screen shot.
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