Upload in progress




PGGB is PCM remastering using extremely long windowed Sinc filters (hundreds of millions of taps) for near perfect reconstruction accuracy. What this means is a more transparent sound, better depth and layering, improved resolution, a cleaner leading edge, and more accurate timbre.

Try it now!


Ultra-Long Linear Phase Filters

Linear phase filters better maintain phase and timing of the original signal, resulting in improved imaging precision. Minimum phase filters, of the same filter length, offer better frequency domain performance and tonal accuracy. As filter length increases, linear phase filters gain a substantial advantage in subjective quality with a trade-off in pipeline delay.

PGGB's file-based approach is not compromised by any of this. Ultra-long windowed Sinc based linear filters stay true to the Nyquist-Shannon sampling theorem and offer the objective best in terms of realism and accuracy.

Optimized Windowed Filters

The ideal Sinc filter is infinitely long—perfect but impractical—so it's approximated with a truncated windowing function. This reduces the 'ripples' in the frequency domain and allows for a steeper filter and better out of band rejection.


PGGB uses an optimized proprietary window function that has an order of magnitude better time domain accuracy than standard windowing functions while delivering as good or better frequency domain performance. This results in near perfect reconstruction of music. 

Maximized Number of Taps

PGGB builds a windowed filter with a number of taps (sinc filter coefficients) that's the largest possible for the track's output sample rate. A 6 minute PCM track upsampled to 16fS uses 250 million taps; a DSD 64 track would use 1 billion taps.

Compared with filter implementations found in even the highest end DACs, PGGB tap counts are in another league. This results in PCM playback of incomparable quality. 

Dynamic Gain Adjustment

Inter-sample-overs refer to clipped audio samples created during reconstruction. These infrequent (but not rare) samples produce very unpleasant audible effects. DACs solve this by applying a fixed attenuation (typically ~4dB) for all tracks.

PGGB uses the preferred approach of detecting all inter-sample overs in the track and applying just enough attenuation to avoid clipping. This maintains music much closer to the original 0dB recorded volume.

High Frequency Noise Filter

Most high resolution recordings (4fS or higher) contain a significant amount of residual noise (beyond 30kHz) as a result of noise shapers used during the original A/D conversion process. There is no music information contained in this noise, so it can be safely removed, and has a positive effect on sound quality.

PGGB uses a single optimized filter that integrates both reconstruction and HF noise filtering for the most transparent sound.

Adaptive Noise Shaping

Unlike dithering, which simply masks the quantization noise, noise shaping pushes the noise out of the audible range. PGGB uses specially designed higher order noise shapers that are optimized for the selected output sample rate and bit depth.

PGGB preserves and reproduces even the smallest of changes accurately, resulting in an extremely clean and analog-like reconstruction.

Perfect DSD

DSD mastered music preserves much of the nuance and detail of the original analog, but its 1-bit modulation and noise shaping smears transients and details. DSD also has massive high frequency noise and a 6dB lower volume for reduced dynamic range.

PGGB reverses this process by incorporating millions or billions tap reconstruction to restore transients and details—plus a single monolithic filter combines HF noise filtering and inter-sample-over detection.

Extreme Precision

PGGB computation is performed at a floating point precision up to 256-bits. The more precise the computation, the lower the noise floor during reconstruction, filtering and noise shaping. No other DAC or upsampling technology comes close.  Select 'Normal' (64/80-bits), 'Insane' (128-bits) or 'Ludicrous' (256-bits) with a commensurate increase in processing time (but thats worth it!).

PGGB.IO uses a fixed setting of 'Normal'.

Endgame Your DAC

PGGB turns any capable DAC into an Endgame DAC. Use USB, I²S or Dual Coax to input the highest resolution PCM that your DAC can handle. PGGB's inherent better quality means the DACs own upsampling stage can be bypassed (NOS mode). The resulting reduced internal digital noise footprint also allows for a more transparent presentation.

Impressed with what you hear? All PGGB.IO orders up to $100 are credited toward a PGGB Offline purchase. PGGB for Mac and Windows