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OE333

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  1. ... maybe I have not expressed it correctly - what I meant was that if a DSP update is necessary it will be done as one part of the T+A firmware update. i.e. The DSP firmware is included in the firmware update file. After updating its own firmware the main controller will check if the DSP firmware from the update file is newer than the installed DSP firmware and if so it will update the DSP.
  2. The DSP processing has never been changed. See my post above:
  3. @sbenyo is correct with his assumption that the update of the DSP software is part of the T+A firmware update. But: A) Regarding the DSP update: 1.) The DSP is not in the signal path for DSD signals. So the DSD performance of the DAC8DSD is not affected in any way by the DSP software. 2.) DSP is only for upsampling PCM signals (all incoming PCM is upsampled to 352.8 / 384 kSps. 3.) The 4 upsampling algorithms (FIR short, FIR long, Bezier polnominal interpolation, Bezier/IIR) are unchanged since production start. So there is no reason and no need to do a firmware upgrade just because of DSP processing. B) Update of the DAC8DSD firmware in general 1.) The older firmware versions have no known bugs - so there is no need for a bugfix firmware update. 2.) The only reason to upgrade to firmware V2.70 is that this version brings the "USB update through front panel buttons" feature. 3.) With older firmware versions a USB update is also possible. It is initiated either by serial connection and "Service Mode 97" command as @Gavin1977 mentioned in a foregoing post (this is the official T+A way), or the "quick and dirty" method with opening the case and shorting 2 pins at the USB receiver as @sbenyo mentioned. Both ways are described in T+A service notes. (those interested in this write me a PN). OE
  4. Dear Gavin, regarding your observations I would like to give a few addiitonal hints and clarifications: Re1: This is true. I know, that T+A is constantly monitoring the progress of the new Amanero firmware. As soon as this new firmware is mature and found to be working without any glitches with Windows and Linux, I am sure that T+A will release a new USB receiver firmware for the DAC8DSD. Up to now there are still some issues with the new Amanero firmware which keep T+A from releasing a new "T+A approved" firmware. Re.2: If you update your USB receiver firmware to the latest Amanero version you can download and install the Amanero Windows driver on your Windows computer. This driver is a ASIO driver - my recommendation: install this Amanero driver and don't use WASAPI. Linux (with a recent kernel version) should work "out of the box" without the need to install or patch anything. Re3: For DAC8DSD with firmware 2.70 onwards there is no need of using the "SERV_MODE 97" command via serial connection. The update of the Amanero USB firmware can be initiated through some front panel button presses. The USB receiver update itself is then done via USB. How to do all this is described in the T+A service note S0143 (see link below): https://github.com/OE333/DAC8-Service-Tool/blob/master/related_docs/S0143_DAC8DSD_Service_Mode.pdf The serial cable is only needed one time to upgrade older DAC8DSD with firmware before 2.7x. After this is done you won't need the serial adapter cable any more. Please note: There is a easier way to upgrade DAC8DSDs with older firmware: The firmware update can be done via web-update through a T+A MP8 streamer. If you don't have one, you might ask your T+A dealer. Perhaps he can help and do the update in his shop. Only if this is not possible, the upgrade via serial adapter cable is necessary. I hope my explanations above were helpful. If anything is unclear don't hesitate to ask. OE333
  5. 2006be11 is currently only available as original Amanero firmware (with Amanero VID/PID numbers). To use this firmware with Windows you need to use the Amanero Windows driver - the driver from the T+A website will only work with firmware having a T+A VID/PID. Using the Amanero driver 2006be11 should work with Windows and Linux - but I have not done extensive testing. So maybe other users can post some of their experience ? I will do some testing as soon as I find the time - I will then report my findings.
  6. Just to say it again: this device is NOT intended to serve as a universal DAC. It was not designed to be combined with Amps or active speakers. It is a DAC + Headphone Amp with the sole aim to drive headphones - and to do this without compromise at the highest possible quality level. Someone looking for a standard DAC with standard line outputs should better look for something different. For someone looking for a high quality Headphone Amp with a superb DAC section might find that this device is exactly what he needs.... If the majority of forum members feels that the HA 200 does not fit into the DAC section of this forum we should perhaps ask to move this thread to the headphone section....
  7. HDMI is mainly intended as an option to connect DVD-A and SACD capable BluRay players. HDMI-ARC is just an additional feature of the HDMI receiver at no extra cost - so why not make it available ?
  8. In 'NOS' PCM mode digital input data is directly fed to the converter stages of the DACs. External oversampling (in the DSP in front of the DAC chips) and internal oversampling filters in the DACs are bypassed. In this way it is possible to directly feed the DACs with externally oversampled signals at 768 kSps and use an external oversampling of choice.
  9. It is possible to use the XLR out on the front panel as a pre-out. It is a very high quality analog out with 8 Ohms output resistance only - perfect for driving long cables to active speakers.
  10. Well, network streaming is not built in - but we have a USB power output jack delivering 5A/1A continous, 2A peak which could be used for a tiny ethernet to USB bridge or NAA.
  11. Well, in fact the three headphone outputs are all analog...😉 But don't get it wrong: This device is not intended to be a standard DAC with standard line or pre-amp outputs. It was designed as a no-compromise Headphone DAC - purely and solely with the aim to get the best out of the very best headphones. Who is looking for a DAC with XLR/RCA outputs to drive amplifiers/pre-amps will be better off with a DAC8DSD which has many of the features in common with the HA 200 but intended to drive amplifiers.
  12. This device is a dedicated headphone amp - so sorry, no pre-amp output on this device.
  13. I never give up my hope .... 😉
  14. Here is some information on the new T+A HA 200 DAC / Headphone Amp combo: https://www.ta-hifi.de/en/headphones/headphone-amplifier/ Key features; PCM up to 768/32 with selectable upsampling algorithms including time-domain optimized "Bezier" upsampling additional: 2 selectable NOS (non oversampling) DAC functions : NOS DAC with analog filtering and "pure" NOS DAC with wide analog bandwidth - the latter intended for high sample rate PCM (fs >= 96kHz) True 1-Bit DSD DAC up to DSD1024 native DSD up to DSD1024 from Windows and Linux sources UAC2 and UAC3 compliant "Thesycon" USB receiver separate signal paths for PCM and DSD galvanic isolation between digital & analog circuits Jitter elimination with femto precision re-clocking pure class-A headphone amp with 100 Watt power supply - up to 700mA (RMS) in class A mode relay Volume control with Vishay high precision resistors and hermetically sealed bi-stable gold contact relays (no steadily flowing relay currents) switchable cross-feed
  15. ... I forgot to mention: DSD up to DSD256 is also possible with DoP. Maybe this information is useful for users with Non-Windows or Non-latest-Linux source devices.
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