In WASAPI is possible to take different sample rate then system default setting and play native without resampling.

The WASAPI will report only that sample rate which is set in Audio Control
Panel (ACP). And only this sample rate can be used by your application if
you are using Shared mode when opening WASAPI device. Opening WASAPI in
Exclusive mode will allow to set any sample rate which is supported by
hardware drivers but other applications won't be able to use this audio
device for I/O.

The gain correction in the input sound card settings. In principle, if that's set to 0 dB you should never see the light green.

--> Just tested it here and it seems to be perfectly in sync. If I increase the gain correction, I see a bright green area on top of the meters, but that's a constant size (as expected).

So question is how other software do it, own code for wasapi instead portaudio?
I wrote about exlusive mode few posts ago.

I think I found it! Turns out you have to initialize PortAudio in the same thread that opens the sound card... and I just put it at the start of the program. I'm now able to do things that didn't work before (with unclear reasons), so I hope you will be too. And I also hope that this means that the Mac version works now.

Edit: Mac version is still bad

Ok my current code works fine on Windows but my old code worked better on Linux. It looks like initializing, terminating, and then initializing again in another thread is not a good idea - although it works in Windows. I'll have to rewrite a bit more code to fix this. Mainly because I fetch the list of available sound cards immediately at startup, then I load the preset, and only then I open the processing thread which handles the sound cards. So now I'll have to do something so I can find out later which sound cards are present, and I need to remember which sound card I want to use without immediately activating it. Ugh.

PortAudio now seems to work properly on Windows and Mac, I'm getting weird warnings printed on Linux (in VMware, that might be related...) but it does work properly after that.
Note: Jack support in the Linux and Mac versions as it was before is REMOVED for now. I'm not sure if there's any use in putting it back, you can still use Jack via PortAudio (just not the left/right channel separtely).

The Mac version now also supports CoreAudio, the Linux version supports ALSA!

Windows 32 bit:
Windows stand alone: http://www.stereotool.com/download/ster ... 25-012.exe
Winamp DSP: http://www.stereotool.com/download/dsp_ ... 25-012.exe
VST: http://www.stereotool.com/download/vst_ ... 25-012.dll

Windows 64 bit:
Windows stand alone: http://www.stereotool.com/download/ster ... 25-012.exe
VST: http://www.stereotool.com/download/vst_ ... 25-012.dll

MAC:
Standalone 64 bit: http://www.stereotool.com/download/ster ... 25-012.zip

Linux:
32 bit stand alone: http://www.stereotool.com/download/ster ... ETA825-012
64 bit stand alone: http://www.stereotool.com/download/ster ... ETA825-012

CHANGES:
- Put all PortAudio calls in 1 thread - was needed for WASAPI
- Made PortAudio work on Mac - weird hack needed (?)

OLD CHANGES:
- Synchronize PortAudio input and output starts
- Make sure that in case of no input audio, the error is reported for the input. Added the watchdog tick to be always called when the callback is called, even if no audio is being played.
- Make buffer filling 50% on start - Wait for first input to return. Only then allow outputs. Also needed for VLC (so the delay can be big!) In fact, the best way might be to connect it to when the first callback of the input sound card happens... enable the other callbacks INSIDE that input callback. But if I do that I need special solutions for VLC and ASIO. And that won't take the calculation time into account, and it might actually be a good thing to take that into account to make the buffer at least not too empty.
- Updated PortAudio to latest version
- Added FM/HD synchronziation slider. You will hear glitches when adjusting it, but no complete dropouts as with changing the buffer size.
- Changed PortAudio callback block size to let PortAudio decide the best size. This might slightly reduce latency and also help against hiccups.
- Added display of supported sample rates (and MME) to sound card selection.
- SST help
- Delossifier Spectral hole filler CPU load is much higher in 8.23 than in 8.00 - no obvious change in the code. - Wasn't true, slightly optimized it anyway.
- Removed old WINMM audio card code, replaced by PortAudio.

TODO:
- GiPHouse build warnings
- Make PortAudio work properly on Linux - it works but with weird warnings and it takes a long time to start.
- Send out RDS texts
- Fix 31N
- Show low input level warning for inputs below - say - around -9 dB or so. For extended periods. Reason; I hear on a local station here that they probably have a too low input level and they didn;'t know that that was a problemn, but the sound on one of the built-in presets wasn't as consistent as it should be, and some tracks sound muffled probably due to too much noise gating.