As rule, DSD demodulator is easier, comparing PCM one (read more). Unfortunatelly, I don't know exactly history of creating DSD, but, looks like, sample rate D64 was designed for transmitting 20 kHz band. Sample rate increasing is easier way to have wider band with lower noise. It may be achieved via increasing sample rate. DSD modulator can lose stability due overload.įor achieving better signal/noise ratio inside audible range and keeping stability, frequency band out of audible range must have reserve by width. More significant pushing of noise energy out of audible range, may lead to lose stability. In general, desing of sigma delta modulator is compromise between stability and noise level. As rule it can't return to stable mode without external impact.

If sigma-delta modulator (DSD modulator) lose stability, need restart it. Sigma-delta modulator (PCM to DSD) is sophisticated audio processing. Practically, some artefacts are in demodulated signal.ĭSD modulator (sigma-delta modulator, convert to DSD) After the filtering, the most useful audio signal remains only. The modulator 'pushes' the noise energy to range above 20 kHz (called as noise shaping).ĭemodulator provides filtering of this noise. The most useful part of an audio signal is placed in range 0. It leads to increased noise level (error).

Sigma-delta demodulator (1-bit) to PCM (multibit), orĭSD modulator provides a decreasing of bit number. PCM (multibit) modulator to delta-sigma modulation (1-bit), orĢ.

Software DSD converter can contain inside:ġ. Format DSD is implementation of sigma-delta modulation.

Ez cd audio converter 64 bit