Stereo Tool

Well, since there's more signal in the input, you might need to set the output level slightly lower to get the same output quality. Without that, I do notice a small quality degradation in the high frequencies when I compare left to right in the current version. (Tested with Loudness set to 3.00). Lowering 'clean/punch' (closer to clean) or 'max punch' (lower than the default 75%, I have to check what that slider did because I've kinda forgotten) seems to fix that though, so it might just take some extra tweaking. (This does lower the bass somewhat, but far less than it has been boosted).
Uhm, no... Actually it has about 2000 (2048 to be precise). Although there is a preprocessing step that handles bass, mids and highs separately, so you could also say that it has 3... Same for Loudness.

hmm . if "3" is it possible/easy to make that configurable (input level) ? -3 <--> +3dB ?
if it will take to much time .. forget my question.

EDIT:
Forget it anyway .. i reduced mutiband threshols for first 3 bannd .. and i gat always same (or less) bass peek level but alwas higher rms.

The levels are now configured such that you're just on the edge of getting distortion or not (and for Loudness, there is a slider to control the maximum volume of the lows!). But if it's working fine, I'll leave it as it is

Version where Bass Boost can be turned on and off and works on both channels is coming up. (Configuring it will follow soon; window with settings is already there in this version but it doesn't do anything yet)

Available now as BETA3A.

i am geting both standalone and dsp installers with one channel bass-boosting...?

Oops ! I uploaded them to the wrong directory! Should be fixed now. Sorry...

Here's another copy of the todo list.

TODO:
- Remove (small) remaining peaks in Final Limiter - they are a bit higher now due to the improved bass handling ■ OK
- Fix very bad Final Limiter quality in low latency settings. ■ OK, fixed. Equal to v4.22 now, but I think I have some more improvements that I can try...
- Beep sounds are not completely constant in volume when they come out - check why and try to solve it. ■ OK, was caused by Pre Limiter, also Highpass filter
- Fix Stereo Boost - I found that it's behaving very differently from what I expected, but I don't know why. ■ OK
- Fix Singleband compressor. ■ OK
- Fix Stereo Boost meter (shows wrong levels, too low - sound is ok though) ■ OK
- Theoretically the CPU load of BETA3 should be clearly LOWER than v4.22 (a lot of optimizations should reduce the CPU load) - but it's only 2% lower. Check why. (Answer: FM: Oversampling in BETA3A, on 2nd CPU in v4.22. Todo: But what about non-FM? - Answer: Multiband is processed twice in Overlap=0 mode! Impossible to fix. ■ DONE
- Improve Deep Bass Boost for higher frequencies (upto ~ > 100 Hz? Probably with a sliding scale?) See post Bojcha on page 40. ■ DONE
- Fix broken sound when FM filter is turned on without Multiband ■ DONE
- Loudness: Deep bass protection in Overlap=0 mode is less good than in Overlap>0 mode. ■ DONE; checkbox added to enable removing DC component (worse quality!)
- Figure out what the difference is between AGC and what I'm doing now, see viewtopic.php?f=18&t=720&start=20 (among others). ■ DONE
- Add separate processing for high frequencies in AGC filter to fix drop in highs when loud bass kicks in. Simple solution: Lows: Process same as now (total signal, then filter); highs: process same as now, but add a constant value for the lows (first filter, then add constant, then process, then remove constant). Make this configurable: For pumping this should be turned off (single channel should be used.) ■ DONE
- AGC: Add code to limit volume rise for high freqs too much above low freqs -> sounds really annoying and 'thin'. ■ DONE, (Waiting for feedback!)
- Attempt to improve the highpass filter in Overlap=0 mode. ■ PARTIAL, works for 30 Hz phase linear at higher latency values (2048, 4096), there's now also a non-phase linear version for 20, 30 and 40 Hz that causes NO artifacts at all. Question: Should I ALSO offer the possibility to use v4.22 filtering? It's better at high freqs.
- Fix highpass filter: Tests show that bass quality in Overlap=0 mode is better than in Overlap>0 mode. If that's the case, then the highpass filter should also be better. But right now it's not. ■ WAITING FOR FEEDBACK
- Fix Hard Limit in Overlap>0 mode (completely destroys the sound at lower latencies at the moment). Noise gate OK, Stereo OK, AGC OK, Multiband OK, Bandpass OK, Singleband OK, Limiting OK, Loudness OK, FM OK
- Make CPU load configurable in Overlap=0 mode: Noise Gate, Stereo, AGC, Multiband, Bandpass, Singleband, Limiting, Loudness, Hard Limit, FM ■ DONE
- Multiband: Highest band max volume must be 77.5% of that in v4.22 for the same sound, why? ■ DONE, was a bug
- Multiband/Output filter: Check order (compare with v4.22 after fixing the other Trumpet related issues). ■ DONE, moved lowpass filter at 400 Hz above lowpass frequency to before Multiband.
- Restore quality/latency display based on the new settings. ■ Mostly done, todo: check if Overlap>0 should still be supported. ■ NO, bass in Overlap=0 is better. This sometimes hurts mid-highs a bit (vibrating female voices). That should probably be solved by lowering the bass level (or clean/punch slider) a bit. But the difference is not big, and except for this Overlap=0 only has benefits (much lower CPU load and much better bass)
- Move benefits of Overlap>0 mode into Overlap=0 mode by changing the window shapes. ■ DONE, didn't really help (introduced either bass rumbling or higher frequency harmonics).
- Attempt to reduce CPU load by simplifying processing: Dualband simpler implementation (4%) ■ DONE, replaced by AGC, Stereo Boost simpler implementation (7%) ■ OK, no longer relevant with faster FFT, noisegate with less bands? (8%), combine Final Limiter with Loudness? (8%) - percentages is what these filters use NOW of the total CPU load in FM Loud Bass Europe mode - possible performance gain is a lot lower.
- Improve AGC channel separation at lower latencies.
- Fix problem with ILDP (Loudness) if bass phases are different.
- Fix low latency de-emphasis (differs too much from normal de-emphasis)
- Trumpet filter and distortion in female voices: Create a new Trumpet filter without distortion.
- Multiband CPU load is probably increased due to high frequency fix, lower it again.
- Check the interface for settings that are no longer used (for example "Multiband HQ").
- Fix Stereo Boost meter (stops after few/many minutes/hours of work)
- Load and save all the new settings to/from disk

Later:
- Add GATING to compressors (stop increasing volume when the input volume gets below a threshold, reduces pumping and very loud volumes after a period of silence).
- Add "Phase Rotator" usefull for microphone processing
- Add Pre-Emphasize for Normal Output (10,15,20,25us), useful for web streaming (?)
- "Do you really want to close ..." message in stand alone version
- Add "LINK" checkbox for "phase differences" in "Calibrate FM transmitter..." (20Hz-10240Hz), [someone call it TILT]
- Enable separate loading and saving of FM calibration settings. ( viewtopic.php?f=16&t=1370 )

Update available as BETA3A: Bass boost is now completely configurable (strength, clipping position, frequency range etc.)

hi Hans,
Great control for Bass boost!