signalpath's latest activity
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signalpath replied to the thread Serious Question: How can DAC's have a SOUND SIGNATURE if they measure as transparent? Are that many confused?.Audiometric testing from long ago (using headphones) found the threshold of hearing to be -8dBSPL at 3kHz. There may be blood flow... -
signalpath replied to the thread Serious Question: How can DAC's have a SOUND SIGNATURE if they measure as transparent? Are that many confused?.We can reasonably correlate an electrical dBFS to an acoustic dBSPL, in a fixed test environment.
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signalpath replied to the thread Serious Question: How can DAC's have a SOUND SIGNATURE if they measure as transparent? Are that many confused?.Two thoughts. 1) With headphones, ambient noise can be at or below the threshold of hearing (-8dBSPL). Do the psychoacoustic math. 2)...
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signalpath replied to the thread Serious Question: How can DAC's have a SOUND SIGNATURE if they measure as transparent? Are that many confused?.Yes, that looks nearly identical to our own -105dBFS plots. Nice work. And this is the best looking -105dBFS sine wave we've seen. Every...
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signalpath reacted to pkane's post in the thread Serious Question: How can DAC's have a SOUND SIGNATURE if they measure as transparent? Are that many confused? with
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Just for fun, here's that same DO300 at +2dB (red) with -120dBFS generated signal (blue). Units are volts at the output of the DAC: -
signalpath replied to the thread Serious Question: How can DAC's have a SOUND SIGNATURE if they measure as transparent? Are that many confused?.Good. What are you using to generate the initial digital sine wave? Also, how is the vertical scale interpreted (the "-60 to -50"...
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signalpath reacted to pkane's post in the thread Serious Question: How can DAC's have a SOUND SIGNATURE if they measure as transparent? Are that many confused? with Like.
Here's +2.0dB setting (5v max) and -105dBFS 1k test signal with DO300:
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signalpath replied to the thread Serious Question: How can DAC's have a SOUND SIGNATURE if they measure as transparent? Are that many confused?.Thanks. As long as you're not using the "notch" inputs, that setup looks good. The DO300 website cites 5.2VFS. For visual waveform...
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signalpath reacted to SIY's post in the thread Serious Question: How can DAC's have a SOUND SIGNATURE if they measure as transparent? Are that many confused? with Like.
Actually, it can be more than inferred. See this, for example.
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There's been a lot of discussion about DAC linearity measurements in various threads, so I thought I'd throw in my opinions and a few...
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signalpath reacted to KSTR's post in the thread Serious Question: How can DAC's have a SOUND SIGNATURE if they measure as transparent? Are that many confused? with Like.
In Germany at least, you need to have a university degree to call yourself "Tonmeister". Half of that very demanding degree is about...
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signalpath replied to the thread Serious Question: How can DAC's have a SOUND SIGNATURE if they measure as transparent? Are that many confused?.Thanks. I checked my notes. The waveform I shared was 30uVrms, which at 5.2V max I think is -105dBFS. What system are you using to...
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signalpath reacted to pkane's post in the thread Serious Question: How can DAC's have a SOUND SIGNATURE if they measure as transparent? Are that many confused? with Like.
That does look much worse than it should. Here's DO300, -100dBFS signal captured without an AP, with 60dB amplification and low-noise ADC:
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signalpath replied to the thread Serious Question: How can DAC's have a SOUND SIGNATURE if they measure as transparent? Are that many confused?.Our AP2722 injects its own visual distortions starting around 50-60uVrms. To overcome this, we use a low-noise preamp (Millennia HV-3)...
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Not quite. I have the fan in the oven and the air conditioning on right now- it wouldn't matter what S/N my amplifiers had- I would hear...