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[Otello]

I have a weird issue with .dff files: setting the DSP to 192 or 176.4 KHz (for greater than 192 KHz)  the sound is affected by a very strong hiss, like an old 78 rpm record; it happens with ASIO and Wasapi, event and push style.
Setting the DSP to 96 or 88.2 KHz it plays as expected.

Suggestions?

[JimH]

Are you playing to a receiver?  I have had problems like that when the receiver wasn't capable of playing the stream.

What happens if you use Windows/Control/Panel/Sounds to test?

[Otello]

Hi Jim,

I'm playing to an Apogee Rosetta DAC, both DAC and sound card (RME HDSPe AIO) work up to 24/192: no problem with wave/flac at 24/192.

[Matt]

The solution, at least for now, is to add a lowpass filter at 75 kHz with Parametric Equalizer.

More here:
http://yabb.jriver.com/interact/index.php?topic=64226.0

The energy should be way past the audible spectrum, but it's causing trouble with some hardware.

I'm investigating tuning the low-pass filter that's a basic part of DSD-to-PCM conversion.

[Otello]

I'm investigating tuning the low-pass filter that's a basic part of DSD-to-PCM conversion.

Matt, may I ask you how JR is filtering now?
For the record, as you probably know, Weiss Saracon use a low-pass filter at 22 KHz.

[Matt]

In a coming build:
Changed: Tuned DSD to PCM conversion to remove high-frequency aliasing noise.