Wolfson 8741 mystery dac

[ittaly]

Anyone know what dac (d/a processor) this YT vlogger may be referring to?

His comments are disabled and the video title is not helpful. I looked in Ali and eBay and found nothing similar.

 

 

[ittaly]

Watching the 2015 video again on larger screen ... it looks like a custom (DIY) job; note the handwritten labels on the PCB, etc . It may be some sort of promo video, promoted by Wolfson themselves to highlight their successor to the WM8740. The narrator is highly praiseworthy of the 8741 over the orig. 8740. And comments are disabled!! Yes, the datasheet for the 8741 (and 8742 for that matter) do note some claimed dB improvements, but the 71 and 72 add DSD and other features like volume control and more select-able filters. All these added features may, in fact, add nasties to orig. 8740 "pure clean" architecture.  So, if you're a Wolfson fan, the 70 may still be best choice for RedBook and non-DSD audio. Esp. in the dual-mono mode.

 

Copied and pasted from manuf. datasheets:

 

WM8470

FEATURES

120dB SNR (‘A’ weighted mono @48kHz), THD+N: -104dB
@ FS
117dB SNR (‘A’ weighted stereo @48kHz), THD+N: -104dB
@ FS
Sampling frequency: 8kHz to 192kHz
Selectable digital filter roll-off
Optional interface to industry standard external filters
Differential mono mode needing no glue logic
Input data word: 16 to 24-bit
Hardware or SPI compatible serial port control modes:
• Hardware mode: mute, de-emphasis, audio format
control
• Serial mode: mute, de-emphasis, attenuation (256
steps), phase reversal
Fully differential voltage outputs

=======================

 

WM8471

FEATURES

Advanced Ultra High Performance Multi-bit Sigma-Delta Architecture
− 128dB SNR (‘A’-weighted mono @ 48kHz)
− 125dB SNR (‘A’-weighted stereo @ 48kHz)
− 123dB SNR (non-weighted stereo @ 48kHz)
− -100dB THD @ 48kHz
− Differential analogue voltage outputs
− High tolerance to clock jitter
PCM Mode
− Sampling frequency: 32kHz to 192kHz
− Input data word length support: 16 to 32-bit
− Supports all standard audio interface formats
− Selectable advanced digital filter responses
− Includes linear/minimum phase and range of tailored characteristics
− Enables low pre-ringing, minimal latency
− Optional interface to industry standard external filters
− Digital volume control in 0.125dB steps with soft ramp
and soft mute
− Anti-clipping mode to prevent distortion even with input
signals recorded up to 0dB
− Selectable de-emphasis support
− Zero Flag output
DSD Mode
− DSD bit-stream support for SACD applications
− Support for normal or phase modulated bit-streams
− Direct or PCM converted DSD paths (DSD Plus)
− DSD mute
Hardware or software control modes:
− 2 and 3 wire serial control interface support
Pin compatible with WM8740
4.5V to 5.5V analogue, 3.0V to 3.6V digital supply operation
28-lead SSOP Package

=======================

WM8472

FEATURES

 Advanced Ultra High Performance Multi-bit Sigma-Delta
Architecture
 126dB SNR (‘A’-weighted mono @ 48kHz)
 123dB SNR (‘A’-weighted stereo @ 48kHz)
 121dB SNR (non-weighted stereo @ 48kHz)
 -100dB THD @ 48kHz
 Differential analogue voltage outputs
 High tolerance to clock jitter
WM8742 used with an external digital filter. PCM Mode
 Sampling frequency: 32kHz to 192kHz
 Input data word length support: 16 to 32-bit
 Supports all standard audio interface formats
 Selectable advanced digital filter responses

Includes linear/minimum phase and range of tailored characteristics

Enables low pre-ringing, minimal latency
 Optional interface to industry standard external filters
 Digital volume control in 0.125dB steps with soft ramp
and soft mute
 Anti-clipping mode to prevent distortion even with input
signals recorded up to 0dB
 Selectable de-emphasis support
 Zero Flag output
 DSD bit-stream support for SACD applications
 Support for normal or phase modulated bit-streams
 Direct or PCM converted DSD paths (DSD Plus)
 DSD mute
 Hardware or software control modes:
 2 and 3 wire serial control interface support
 Pin compatible with WM8740 and WM8741
 4.5V to 5.5V analogue, 3.15V to 3.6V digital supply operation
 28-lead SSOP Package