Please do not hesitate to ask - if you have any questions. This is the BETA version so it is not for public dissemination as there may be addition revisions before the formal release. To summarise, the DoP "pop" is a DoP issue, which is fixed in a number of software packages and which affects a fair few DACs, but we decided not to rely on the Software Developers to reiolve this upstream issue but fix it in the DoP implementation. With 5.2A, the user MUST make sure to manually alter the PCM audio settings correctly (especially Mac), otherwise there will be no audio output at all. Version 4.06 minimised the occurrence of these big bangs. Nano iDSD and micro iDAC2 CANNOT decode 768kHz at the DAC level, but they can all be programmed to receive 768kHz PCM at the USB interface level hence enable DSD256 (DoP). If this is not done the DAC may have unmuted on the PCM signal (which is not Audio) and is then forced to change format, but the format from the USB Section has already changed, so it does a "pop pop" . This is inherent to the DoP standard and is handled in some software via "Play little silence". When the DSD signal is sent as DoP the DoP Standard requires to switch to DSD after a large number of DoP markers have been received, so there is delay when starting the track between receiving PCM and recognising DoP DSD. So the key change is an upgraded version of the core code and bug fixes. Ģ) Apply previous Clock and Code optimisation to 6.6 coreģ) Fix completely clicks when switching between PCM and DoP DSDĤ) Fix for some units where small timing bug on v4.06 caused vinyl static like clicks at 192kHz sample rates Please find attached the latest beta firmware for the micro iDSD (suitable for nano iDSD and Retro also but not other iFi components). It's completely transparent: staring BitPerfect automatically starts iTunes. It will change the Midi configuration to always play your file in its native sampling rate, so you will be at 44.1 unless the sampling rate is higher. The following is for experienced computer users - if you do not feel comfortable, please do not attempt. Instead upsampling everything to 96k, go to the App Store and get BitPerfect. Nano/micro iDSD or Retro - BETA firmware v0.16 Beta
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