Stereo Tool

Dual core Athlon II 2.8 Ghz . But i already tell that all is only tests. Two instances is not what i like so nevermind i said that it`s Hans`s decision, i only share my opinion.

It doesn't sound bad but such peaks are illegal, can cause disturbance to other stations and may cause distortion on some receivers. That's why I'm not planning to fix it - again you *should not* use this for FM.

If you want to use the Advanced Clipper with less CPU load, you can always disable the Advanced Bass Distortion Protection - that will reduce it by half. And you can make some more changes to reduce it further.

I understand you Hans .
Don`t know for the Bass protection till now that is CPU "hungry" but will try to switch it off and do some tests , thank you .

I guess that you saw the problem with the "Input without processing" - the smashed sound ?

The without processing bug should be fixed in the next beta (together with a lot of VLC issues).

STAND ALONE: http://www.stereotool.com/download/ster ... 43-005.exe
WINAMP DSP: http://www.stereotool.com/download/dsp_ ... 43-005.exe

FIXED:
- Carrier at +/- 19khz on the AM band. Just turning the FM off doesn't kill the stereo pilot. (fixed in 004)
- I again will say here that there is something wrong with Calibration section . Three options are identical with what they do : Test right silence , Test SSB lower and Test SSB higher. Nevermind what option you check, they causes same display behavour and same result as audio. --> NO, they are very different if you look at the actual output. Display is generated before calibration. Actual output does contain SSB or LSB audio.
- At the new Normal output settings there is a problem with "Input without processing" option . Sound is gagged/strange / I'm not at my Stereotool pc at the moment but when using a pipeline input and normal & fm output (192 kHz) , I noticed a strange effect when switching the normal output to bypass. Sounded like it could be a sampling rate thing? - Worked fine in some cases but not in others. I think it's fixed now.
- I think I also noticed a small typo - check the AM transmitter window.
- On the thorium preset it plays fine and then gets garbled and sounding like a 45rpm song playing on 33 rpm. cpu load is just 26% the rest of the presets work fine. (waiting for feedback, unable to reproduce it). --> Multipath Clipper is enabled in this preset. That explains the higher CPU load.
- VLC output still hangs on outputs that don't work (for example an invalid ShoutCast address). Probably because no data is sent through the output path, which causes the same stop hangup again. --> If Status is STOPPED, ERROR or NOTHINGSPECIAL, I don't call STOP or RELEASE. This seems to cause a small memory leak (a few kB probably) every time it happens, so it's not ideal. But better than a complete hangup. Still waiting for feedback on a question in VLC's forum.
- Add VLC output error detection & re-connect behavior (if possible without resetting the other inputs/outputs).
- VLC input: But something is strange sometimes plays like 1 or more samples delay between channels, occurs highs cancelation when switch to mono. I checked everything including exact mono sound input. -> Output was already running before connection was established. That's ok, but the start sample must be left channel -> fixed.
- VLC input with Low Quality Low Latency output hangs -> Solved by disabling LQLL output when VLC is used for input (which makes it impossible to reach low latencies anyway)
- VLC MP3 output. No room in current settings window... -> You can now add more options in the SOUT string (space separated)

OLDER CHANGES:
4. Turn AM stuff off if FM is enabled (?) but what about asymmetrical clipping/limiting for FM? -> Extra switch in Expert mode
5. Add pre-emphasize output button for AM pre-emphasis
Fixed the mentioned and some other bugs in the previous beta. All combinations of settings seem to work now.
- Normal Output can now be partially separately processed for FM output. So you can generate, for example, a composite clipped 75 us pre-emphasized FM signal and a not or far less pre-emphasized signal for streaming, or a separate FM signal without composite clipping to feed remote transmitters, in the same Stereo Tool instance - no more need to run a separate copy for the stream! Only the clipping and limiting is done separately, so the CPU load does not go up much. Note that the lowpass filter can not be specified separately (lowpass filtering happens much earlier in the sequence and using different values would require doing almost all the processing twice).
- AM section now contains an 'AM Transmitter' Enabled switch.
- Headroom slider added to the AM section. No more need to abuse the Post Amp slider to create headroom for asymmetrical output. (Note: It's also not possible anymore, so you need to update your settings if you use AM).
- AM pre-emphasis checkbox added in the AM section, so you don't have to abuse the FM pre-emphasis anymore.
- AM pre-emphasis curve (which is slightly different from the FM curve) is now correctly implemented.
- AM signal can now go through the FM sound card output (it's now basically an FM/AM sound card), including tilt correction etc.

Bugs reported and some todo's:
- Show Lowpass filter freq in AM panel?
- C-QUAM?

Confirm "input without processing" is now working OK

C-QUAM would be a very nice option!!!!

I notice with the same settings for Advanced Clipper i have 30% CPU additional , not 15 like i said before .In older versions as i remember it was not like that much. Anyone else to have raise of this load ?

WOW , i now turn back to 6.21 version and saw a HUGE difference about CPU load With Advanced clipper" and all the other stuff like in the newest one i have all 22% load . With the newest one i have about 50% . It`s a bit above "double the load"
I must tell that with the old one i have more precise clipping of the MPX 100% modulation.
Is this only caused by the new GUI ? or not only . Yes the new MB is definitely a good advance but it`s only a few % high may be 3-4 . But from where is that double the load ?

I think i solve my memory problem ( as i told you ones that ST is faling to 50 Mb ) So now i see Load is around 30-32% with Advanced clipper . That`s more like it should be.

Please send me the settings that you used for testing. 6.21 cpu load should be a lot higher than that of the latest version...