Lambda
Added in v0.26.0
Apply a user-defined transform (callable) to the signal. The inspiration for this
transform comes from albumentation's lambda transform. This allows one to have a little
more fine-grained control over the operations in the context of a Compose, OneOf or SomeOf
Usage example
import random
from audiomentations import Lambda, OneOf, Gain
def gain_only_left_channel(samples, sample_rate):
samples[0, :] *= random.uniform(0.8, 1.25)
return samples
transform = OneOf(
transforms=[Lambda(transform=gain_only_left_channel, p=1.0), Gain(p=1.0)]
)
augmented_sound = transform(my_stereo_waveform_ndarray, sample_rate=16000)
Lambda API
transform:Callable- A callable to be applied. It should input samples (ndarray), sample_rate (int) and optionally some user-defined keyword arguments.
p:float• range: [0.0, 1.0]- Default:
0.5. The probability of applying this transform. **kwargs- Optional extra parameters passed to the callable transform