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Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
AudioLazyAudioLazy
Danilo de Jesus da Silva BelliniDanilo de Jesus da Silva Bellini
(AudioLazy developer)(AudioLazy developer)
https://github.com/danilobellini/audiolazyhttps://github.com/danilobellini/audiolazy
https://pypi.python.org/pypi/audiolazyhttps://pypi.python.org/pypi/audiolazy
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
AudioLazyAudioLazy
● DSP (Digital Signal Processing)
– Análise
– Síntese
– Processamento
● Expressividade de código
● Tempo real
Documentação (Sphinx)
http://pythonhosted.org/audiolazy
Python
2.7
Python
2.7
e
3.2+!
e
3.2+!
82% branch coverage
11k+ tests (2k+ por ambiente)
tox + py.test
Cpython 2.7/3.2/3.3/3.4
PyPy
TRAVIS CI!
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
AnáliseAnálise
● ZCR (Taxa de cruzamento no zero)
● DFT (Transformada Discreta de Fourier)
● AMDF (Average Magnitude Difference Function)
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
SínteseSíntese
● Ring modulation, AM, FM, aditiva, subtrativa, …
● Formas de onda
– Senoides
– Sawtooth
– Table lookup
● Ruído
– Branco/uniforme
– Gaussiano
● Exemplos
– FM: mcfm.py
– Subtrativa: formants.py
– Aditiva com senoides: shepard.py
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
Filtros linearesFiltros lineares
● Síntese subtrativa (e.g. play_bach_choral.py)
● Comb, ressonador, passa-baixas, passa-altas, …
● Wah, knob guitarra (passa-baixas RC), ...
filt = 1./9. * (4 - z ** -2) / (1 + .8 * z ** -1 + .4 * z ** -2)
filt.zplot().savefig("zeropolo.pdf")
fcomb = comb.fb(25, .95)
fcomb.plot().savefig("plot-comb.pdf")
filt = 1./9. * (4 - z ** -2) / (1 + .8 * z ** -1 + .4 * z ** -2)
filt.zplot().savefig("zeropolo.pdf")
fcomb = comb.fb(25, .95)
fcomb.plot().savefig("plot-comb.pdf")
1 2
1
2
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
ProcessamentoProcessamento
● Distorção
● Flanger
● Phaser
● Wah
● Robotização de voz
● Delay
● Reverb
● Remoção de ruído
...
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
https://github.com/RicardoBoccoliGallego/DigitalPedalBoard
PedaleiraPedaleira
feita com afeita com a
AudioLazyAudioLazy
por 4por 4
alunos daalunos da
Poli-USPPoli-USP
Danilo J. S. BelliniDanilo J. S. Bellini
@danilobellini@danilobellini
AudioLazy – 2014-04-12AudioLazy – 2014-04-12
São José dos Campos / SPSão José dos Campos / SP
Obrigado!Obrigado!
Perguntas?Perguntas?
https://github.com/dhttps://github.com/danilobellini/audiolazyanilobellini/audiolazy

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(2014-04-12) [Python Vale] AudioLazy

  • 1. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP AudioLazyAudioLazy Danilo de Jesus da Silva BelliniDanilo de Jesus da Silva Bellini (AudioLazy developer)(AudioLazy developer) https://github.com/danilobellini/audiolazyhttps://github.com/danilobellini/audiolazy https://pypi.python.org/pypi/audiolazyhttps://pypi.python.org/pypi/audiolazy
  • 2. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP AudioLazyAudioLazy ● DSP (Digital Signal Processing) – Análise – Síntese – Processamento ● Expressividade de código ● Tempo real Documentação (Sphinx) http://pythonhosted.org/audiolazy Python 2.7 Python 2.7 e 3.2+! e 3.2+! 82% branch coverage 11k+ tests (2k+ por ambiente) tox + py.test Cpython 2.7/3.2/3.3/3.4 PyPy TRAVIS CI!
  • 3. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP AnáliseAnálise ● ZCR (Taxa de cruzamento no zero) ● DFT (Transformada Discreta de Fourier) ● AMDF (Average Magnitude Difference Function)
  • 4. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP
  • 5. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP SínteseSíntese ● Ring modulation, AM, FM, aditiva, subtrativa, … ● Formas de onda – Senoides – Sawtooth – Table lookup ● Ruído – Branco/uniforme – Gaussiano ● Exemplos – FM: mcfm.py – Subtrativa: formants.py – Aditiva com senoides: shepard.py
  • 6. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP Filtros linearesFiltros lineares ● Síntese subtrativa (e.g. play_bach_choral.py) ● Comb, ressonador, passa-baixas, passa-altas, … ● Wah, knob guitarra (passa-baixas RC), ... filt = 1./9. * (4 - z ** -2) / (1 + .8 * z ** -1 + .4 * z ** -2) filt.zplot().savefig("zeropolo.pdf") fcomb = comb.fb(25, .95) fcomb.plot().savefig("plot-comb.pdf") filt = 1./9. * (4 - z ** -2) / (1 + .8 * z ** -1 + .4 * z ** -2) filt.zplot().savefig("zeropolo.pdf") fcomb = comb.fb(25, .95) fcomb.plot().savefig("plot-comb.pdf") 1 2 1 2
  • 7. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP ProcessamentoProcessamento ● Distorção ● Flanger ● Phaser ● Wah ● Robotização de voz ● Delay ● Reverb ● Remoção de ruído ...
  • 8. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP
  • 9. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP
  • 10. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP
  • 11. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP
  • 12. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP
  • 13. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP
  • 14. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP
  • 15. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP
  • 16. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP
  • 17. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP
  • 18. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP https://github.com/RicardoBoccoliGallego/DigitalPedalBoard PedaleiraPedaleira feita com afeita com a AudioLazyAudioLazy por 4por 4 alunos daalunos da Poli-USPPoli-USP
  • 19. Danilo J. S. BelliniDanilo J. S. Bellini @danilobellini@danilobellini AudioLazy – 2014-04-12AudioLazy – 2014-04-12 São José dos Campos / SPSão José dos Campos / SP Obrigado!Obrigado! Perguntas?Perguntas? https://github.com/dhttps://github.com/danilobellini/audiolazyanilobellini/audiolazy