AD1446 can realize music pitch effect ?
I assume you mean pitch shifting, correct? Most pitch-shifting algorithms require frequency-domain processing in order to be done transparently. Unfortunately, SigmaDSP's hardware architecture does not (yet) allow for frequency-domain processing, so this is not possible on the ADAU144x.
Although there are some methods of doing pitch shifting using stream-oriented processing, the results don't sound great and they are very processor-intensive.
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