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http://dx.doi.org/10.7776/ASK.2013.32.4.346

Implementation of the High-Quality Audio System with the Separately Processed Musical Instrument Channels  

Kim, Tae-Hoon (동의과학대학교 전자과)
Lee, Sang-Hak (동의과학대학교 전자과)
Kim, Dae-Kyung (동의과학대학교 전자과)
Lee, Sang-Chan (동의과학대학교 전자과)
Publication Information
The Journal of the Acoustical Society of Korea / v.32, no.4, 2013 , pp. 346-353 More about this Journal
Abstract
This paper deals with the implementation of a high-quality audio system for karaoke. For improving the key/tempo changes performance, we separated the audio into many musical instrument channels. By separating musical instrument channels, high-quality key/tempo changes can be achieved and we confirmed this using the cross-correlation distribution and the MOS evaluation. The improved audio system was implemented using the TMS320C6747 DSP with fixed/floating-point operations. The implemented audio system can perform the multi-channel WMA decoding, the MP3 encoding/decoding, the wav playing, the EQ, and the key/tempo changes in real time. The WMA channels used for processing the separated instrument channels. The audio system includs the MP3 encoding/decoding function for playing and recording and the wav channel for the effect sound.
Keywords
Tempo; Pitch; Audio; DSP; Karaoke;
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