Using Pitch Shifters in Generative Audio Processing
How Can Pitch Shifters Add Variation to Recorded Sounds?
Using Pitch Shifters in Generative Audio Processing
Pitch shifters are commonly used to correct tuning problems or adjust the relationship between audio sources.
In generative music they can become tools for controlled transformation.
Beyond Correction
Most pitch shifters allow adjustment in:
semitones,
tones,
- octaves.
These controls make them suitable not only for tuning but also for modulation.
Working with Recorded Material
One particularly useful application is processing recorded sounds.
Instead of replaying a sample exactly as recorded, occasional pitch changes introduce new perspectives on familiar material.
Moderate Modulation
The chapter emphasizes moderate pitch changes rather than extreme transformations.
Small shifts often preserve the identity of the source while still creating variation.
Relationship to Granular Processing
Pitch shifters and granular processors can achieve similar goals.
Both allow transformation of existing recordings.
However, pitch shifters generally focus on changing pitch while preserving timing relationships.
Conclusion
Pitch shifters provide a simple but effective method for introducing controlled variation into recorded sounds and generative audio environments.
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