SyntheticTest » History » Version 2
Chris Cannam, 2013-11-07 04:53 PM
| 1 | 1 | Chris Cannam | h1. Synthetic test material |
|---|---|---|---|
| 2 | 1 | Chris Cannam | |
| 3 | 1 | Chris Cannam | h2. Sinusoid at fs/4 |
| 4 | 1 | Chris Cannam | |
| 5 | 1 | Chris Cannam | In Yeti terms: |
| 6 | 1 | Chris Cannam | |
| 7 | 1 | Chris Cannam | <pre> |
| 8 | 1 | Chris Cannam | testStream = manipulate.withDuration 64 (syn.sinusoid 8 2); |
| 9 | 1 | Chris Cannam | cq = cqt { maxFreq = testStream.sampleRate/2, minFreq = 1, binsPerOctave = 4 } testStream; |
| 10 | 1 | Chris Cannam | </pre> |
| 11 | 2 | Chris Cannam | |
| 12 | 2 | Chris Cannam | Or to put it another way (in MATLAB this time): |
| 13 | 2 | Chris Cannam | |
| 14 | 2 | Chris Cannam | <pre> |
| 15 | 2 | Chris Cannam | test = [0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1 ]; |
| 16 | 2 | Chris Cannam | out = cqt(test,1,4,4,8) |
| 17 | 2 | Chris Cannam | </pre> |
| 18 | 2 | Chris Cannam | |
| 19 | 2 | Chris Cannam | That is, a 64-sample input of 8Hz sample rate containing a sinusoid at fs/4, transformed using CQ parameters fmin = 1, fmax = 4 (or fs/2), and bpo = 4. |