Real-time Soundprism


This paper presents a parallel real-time sound source separation system for decomposing an audio signal captured with a single microphone in so many audio signals as the number of instruments that are really playing. This approach is usually known as Soundprism. The application scenario of the system is for a concert hall in which users, instead of listening to the mixed audio, want to receive the audio of just an instrument, focusing on a particular performance. The challenge is even greater since we are interested in a real-time system on handheld devices, i.e., devices characterized by both low power consumption and mobility. The results presented show that it is possible to obtain real-time results in the tested scenarios using an ARM processor aided by a GPU, when this one is present.

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This work has been supported by the “Ministerio de Economía y Competitividad” of Spain and FEDER under projects TEC2015-67387-C4-{1,2,3}-R.

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Correspondence to A. J. Muñoz-Montoro.

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Muñoz-Montoro, A.J., Ranilla, J., Vera-Candeas, P. et al. Real-time Soundprism. J Supercomput 75, 1594–1609 (2019).

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  • Sound source separation
  • Real-time
  • Score alignment
  • Audio processing
  • Parallel computing