Scale more CCs (probonopd#135)

probonopd#122 (comment)

Next try for ReverbMixer and NEON extensions (RPi2/3/4) (probonopd#86)

* Signal chain is now float32_t with much more support of CMSIS5.

* Fixes for float signal path.

* Several fixes for float signal path.

* Manual merge of changes from upstream.

* Fixes for wrong panning calculation.

* Added code for master compressor.
Added code for mixer.
Added HAVE_NEON to MAkefile for enabling more optimizations on Synth_Dexed.

* Adding mixer class - but it has some linking problems...

* Fast fix.

* Next fast fix.

* Fixing effect_mixer.

* Added ReverbSend Parameter for each TG.

* Fixes for ReverbSend and Pan.

* Fixing constrain().

* Fix aarch64 build, thanks @rsta2

probonopd#85 (comment)

* Fix for building for RPi1.

* Add TGParameterReverbSend

probonopd#86 (comment)
Thanks @rsta2

* Add TGParameterReverbSend

probonopd#86 (comment)
Thanks @rsta2

* Implement changes suggested by @rsta2

Description:
probonopd#86 (comment)

Thanks @rsta2

Co-authored-by: Holger Wirtz <[email protected]>
Co-authored-by: probonopd <[email protected]>

Added support for CMSIS_5, so upstream Synth_Dexed can be used (probo…

…nopd#41)

* Fixes for using standard Synth_Dexed.
Added support for CMSIS.

* Fix for branch of Synth_Dexed

* Submodules for Synth_Dexed and CMSIS_5 added.

Co-authored-by: Holger Wirtz <[email protected]>

Fix previous commit