Sequencer1

I haven't explored the unit's oversampling or digital filter settings extensively and I currently use headphones. I usually leave 'Upconvert' off, unless it's pre-1960s music that's very dull sounding. It seems to boost overall volume by around 1db and makes the trebles sound a bit more 'glassy', but can increase sibilance and hot trebles in a lot of 'hot' modern recordings. PCM DF can be 'Off', 'Slow' or 'Sharp' but I usually leave it off. 'Slow' or 'Sharp' seems to have the same effect on trebles as 'Upconvert', but I haven't tested it too much. For DSD playback, I use the default 'FIR2' which is the loudest. Again, I haven't experimented very much with the digital filters. I've been listening to well-recorded live music on DSD, and the soundstage depth is amazing, along with the dynamic range (scary), and smooth vinyl-like trebles. Space between instruments and ambience in a live recording made in a small to mid-sized room is so clear and life-like. Overall the unit sounds rich, full, and smooth; very different than the CEntrance units or the Benchmark DAC1 USB it replaced. Plenty of detail, great separation between instruments, no muddiness in the lower midrange or upper-bass, no blurring between instruments, and monophonic sources (i.e.-vocals, bass guitar, and solo instruments in the center of the stereo image) sound full and rich. Impressive.

Hi valenroy, I found it! Thanks again for this! Hi Miska, Before purchasing the TEAC UD-501, I downloaded the driver to check if it had a latency buffer slider in it's ASIO Control Panel, and it does, but it is grayed out, and cannot be moved. Before purchasing, I thought it was grayed out since I didn't have the hardware connected, but even with the UD-501 connected, the slider is grayed out. valenroy's registry mod instantly updates the grayed-out slider in the TEAC ASIO Control Panel: Computer\HKEY_USERS\S-1-X-XX-XXXXXXXXXX-XXXXXXXXX-XXXXXXXXXX-1000\Software\TEAC\ASIO USB DRIVER Rght-click 'buffer_size', select 'Modify', change Base value from Hexadecimal to Decimal, which should change the 'Value data' from 'd8' to '200', change 'value data' to a lower number. 200 will correspond to 20ms, 100 - 10ms , etc... I set it to '30' which at 96000Hz is 3.0ms (288 samples), and at 192000Hz is 3.0ms (576 samples). Output latency is around 9ms (at 192000Hz) and 5ms (at 96000Hz), so when I press a key on my USB MIDI keyboard and the softsynth processes the sound, it takes around 9ms (or 5ms depending on sample rate) from key-press to hear the note in my headphones. I tested it with some large tracks in Cakewalk Sonar, at both 24bit/96kHz and 24bit/192kHz and I get no pops, clicks, or dropouts when running the buffer size at 3.0ms (30 in registry). I tried 1ms and got the occasional pop and click, but no complete dropouts. Also listened to DSD files and PCM in the TEAC Media Player and in foobar2000, and no issues. This DAC sounds wonderful, and it replaced a couple of very popular (and more expensive) DACs for me. The ASIO latency buffer issue was the only issue I had with it since I like to work with digital audio and VST/VSTi's. This trick completes the package. Very happy, Thank You valenroy!

valenroy, this is a great post, thank you for taking the time to write this. I searched through the registry and found the keys for TEAC and USB Audio interface, but didn't find any key relating to latency. Could you tell me what line to edit? Also, I noticed that several of the keys reference the config files in: C:\Program Files\TEAC\AsioUsbDriver. Can any files in here be edited to adjust latency? I'd like to use the TEAC UD-501 with VST and VSTi plug-ins, so lower latency would be nice. Thank you!