diff options
| -rw-r--r-- | simpl/examples/timestretch.py | 26 | ||||
| -rw-r--r-- | simpl/fx.py | 21 |
2 files changed, 0 insertions, 47 deletions
diff --git a/simpl/examples/timestretch.py b/simpl/examples/timestretch.py deleted file mode 100644 index f5870ac..0000000 --- a/simpl/examples/timestretch.py +++ /dev/null @@ -1,26 +0,0 @@ -import simpl -from simpl.fx import time_stretch -from scipy.io.wavfile import read, write -import numpy as np - -input_file = '../../tests/audio/flute.wav' -output_file = 'flute_2x.wav' -time_stretch_factor = 2 - -audio_in_data = read(input_file) -audio_in = simpl.asarray(audio_in_data[1]) / 32768.0 # values between -1 and 1 -sample_rate = audio_in_data[0] - -print "Time stretching", input_file, "by a factor of", time_stretch_factor -pd = simpl.SndObjPeakDetection() -pd.max_peaks = 100 -peaks = pd.find_peaks(audio_in) -pt = simpl.SndObjPartialTracking() -pt.max_partials = 10 -partials = pt.find_partials(peaks) -partials = time_stretch(partials, time_stretch_factor) -sndobj_synth = simpl.SndObjSynthesis() -audio_out = sndobj_synth.synth(partials) -audio_out = np.asarray(audio_out * 32768, np.int16) -print "Writing output to", output_file -write(output_file, 44100, audio_out) diff --git a/simpl/fx.py b/simpl/fx.py deleted file mode 100644 index a3ba065..0000000 --- a/simpl/fx.py +++ /dev/null @@ -1,21 +0,0 @@ -from simpl import Partial -import numpy as np - - -def time_stretch(partials, factor): - """Time stretch partials by factor.""" - stretched_partials = [] - step_size = 1.0 / factor - - for partial in partials: - stretched_partial = Partial() - stretched_partial.starting_frame = partial.starting_frame * factor - stretched_partial.partial_id = partial.partial_id - num_steps = int((partial.get_length() - 1) / step_size) - current_step = 0 - for step in range(num_steps): - current_peak = partial.peaks[int(np.floor(current_step))] - stretched_partial.add_peak(current_peak) - current_step += step_size - stretched_partials.append(stretched_partial) - return stretched_partials |