I need to recognize notes from melody, so I used this demo code:
#! /usr/bin/env python
import sys
from aubio import source, notes
if len(sys.argv) < 2:
print("Usage: %s <filename> [samplerate]" % sys.argv[0])
sys.exit(1)
filename = sys.argv[1]
downsample = 1
samplerate = 44100 // downsample
if len( sys.argv ) > 2: samplerate = int(sys.argv[2])
win_s = 512 // downsample # fft size
hop_s = 256 // downsample # hop size
s = source(filename, samplerate, hop_s)
samplerate = s.samplerate
tolerance = 0.8
notes_o = notes("default", win_s, hop_s, samplerate)
print("%8s" % "time","[ start","vel","last ]")
# total number of frames read
total_frames = 0
while True:
samples, read = s()
new_note = notes_o(samples)
if (new_note[0] != 0):
note_str = ' '.join(["%.2f" % i for i in new_note])
print("%.6f" % (total_frames/float(samplerate)), new_note)
total_frames += read
if read < hop_s: break
https://github.com/aubio/aubio/blob/master/python/demos/demo_notes.py
And first note in melody not determining correctly. So, i made C major musical scale and programm printed me, that the first note is Am (But it must be C). But the funniest is that the other notes are correct. My output:
time [ start vel last ]
0.029025 [ 64. 108. -1.]
0.516644 [ 47. 106. 64.]
0.975238 [ 49. 109. 47.]
1.439637 [ 50. 106. 49.]
1.898231 [ 52. 108. 50.]
2.362630 [ 54. 109. 52.]
2.821224 [ 56. 109. 54.]
3.285624 [ 57. 108. 56.]
First number in lists is a code for MIDI note. How could I fix it?
