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- Hello and welcome to Tobybear MadShifta!
-
- This is a VST plugin (PC only) by Tobybear (www.tobybear.de) and
- Bram (www.smartelectronix.com) with full Delphi source included!
- It is available on Bram's truly excellent DSP source code page
- www.musicdsp.org!
-
- 1. What does it do?
- Well, as Bram puts it: it is a "ultrafast and lofi pitchshifter",
- where the pitch of the audio is changed in realtime while the
- tempo is preserved.
- You can adjust the pitch in semitones (+/- 24 semitones) and
- with finetuning. Furthermore a delay line with feedback is
- included and the obligatory LP/HP filter with resonance!
- Extra special feature: you can use MIDI note messages to pitch
- the audio in realtime up or down, relatively to a root key.
- Furthermore a randomizer, dry/wet and output adjustments enhance
- the fun :-)
-
- Note: Our main intention here was to make clear how such an algorithm
- could be implemented, but the way it is presented here may not
- necessarily be the most performance-oriented way, so there is always
- room for improvement.
-
- 2. The controls:
- tune: pitch audio stream up/or down with up to 24 semitones
- fine: fine tuning of the pitching
- root: root note, if MIDI "Note on" messages are received the
- audio is pitched relatively to that note in semitones
- hold/back: describes MIDI behaviour: "hold" means the relative
- distance between root and current note stays the current pitch,
- if "back" is set, it falls back to the original pitch once a "note off"
- is received
- delay: delay amount, logarithmic scale
- feedback: feedback amount of the delay
- cutoff: filter cutoff
- resonance: filter resonance
- LP/HP: sets filter type (lowpass or highpass)
- dry/wet: controls amount of processed (pitched) signal in relation
- to the original signal
- outvol: the output volume
-
- Click on "VS" to switch text display on/off
- Click on the bear to the left to randomize all parameters
- Click on the note to the right to randomize only pitch
-
- 3. Why is the source code in Delphi?
- Well, Delphi is still a very underestimated and underrated DSP langauge,
- but it is in my opinion equally powerful as C++. Check out my other plugins
- at www.tobybear.de, they are all coded in Delphi too.
- So, first of all, to show people that it is also possible to compile
- VST plugins without a C++ compiler, secondly because there aren't that
- much Delphi open source DSP codes floating around.
-
- 4. What can I do with the source code?
- Look through it, learn from it, enhance it, add new features, but always
- give proper credits to both of us! I say it again: this plugin and its
- source code are mainly meant as a learning resource!
- Some possible extensions:
- - stereo mode/delay
- - variable buffer sizes
- - other filter modes
- - sync to host
- - filter/delay routing
- - longer delay times
- - LFOs
-
- 5. What do I need to compile this plugin?
- A Delphi version, naturally :-), 3.0 or above should work. I coded it
- with the Delphi 6 PE Edition that is available for free at
- www.borland.com (150MB though!). This is the whole compiler/editor/IDE
- with no restrictions, but just for personal use, you are not allowed to
- sell any programs created with it.
-
- Furthermore you need to install the tobygauges.pas component also
- included with this package before attempting to compile the MadShifta
- project. Just use "Component - Install Component", enter path to
- tobygauges.pas in "Unit file name", then "OK". This component adds
- mouseover and mousedown events to the standard Delphi gauge as well as
- eliminating the need for the trunc() function.
-
- 6. Final words
- None of us is responsible if anything goes wrong with this plugin, you
- use it at your own risk. Of course we tried to prevent any possible harm,
- after all it is just a simple pitchshifter :-)
-
- Contact:
- tobybear@web.de
- bram@smartelectronix.com
-
- www.tobybear.de
- www.smartelectronix.com
- www.musicdsp.org
-
-