Atrac Converter Download Software11/14/2022 ![]() ![]() GHA encodes parameters of extracted sine waves such as frequency, amplitude and phase into final bitstream.Īfter the sine waves extraction the remained signal (residual) will be transformed into frequency domain by a 128-point Modified discrete cosine transform. The sample-frame size is 2048 samples per channel.Īfter the subband splitting ATRAC3plus tries to extract sine waves from each subband using Generalized Harmonic Analysis (further GHA). The signal is split into 16 subbands using Polyphase Quadrature Filter (further PQF) before MDCT and bit allocation. The following bitrates are offered by the Sony Encoding software:ĪTRAC3plus is a hybrid subband/MDCT codec like MP3. There is a multi-channel version of ATRAC3plus called "ATRAC-X".ĪTRAC3plus technical documentation Available bitratesĪTRAC3plus operates on fixed bitrates only.
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