Logic Pro User Guide for iPad
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- What is Logic Pro?
- Working areas
- Work with function buttons
- Work with numeric values
- Undo and redo edits in Logic Pro for iPad
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- Intro to tracks
- Create tracks
- Create tracks using drag and drop
- Choose the default region type for a software instrument track
- Select tracks
- Duplicate tracks
- Reorder tracks
- Rename tracks
- Change track icons
- Change track colors
- Use the tuner on an audio track
- Show the output track in the Tracks area
- Delete tracks
- Edit track parameters
- Start a Logic Pro subscription
- How to get help
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- Intro to recording
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- Before recording software instruments
- Record software instruments
- Record additional software instrument takes
- Record to multiple software instrument tracks
- Record multiple MIDI devices to multiple tracks
- Record software instruments and audio simultaneously
- Merge software instrument recordings
- Spot erase software instrument recordings
- Replace software instrument recordings
- Capture your most recent MIDI performance
- Route MIDI internally to software instrument tracks
- Record with Low Latency Monitoring mode
- Use the metronome
- Use the count-in
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- Intro to arranging
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- Intro to regions
- Select regions
- Cut, copy, and paste regions
- Move regions
- Remove gaps between regions
- Delay region playback
- Trim regions
- Loop regions
- Repeat regions
- Mute regions
- Split and join regions
- Stretch regions
- Separate a MIDI region by note pitch
- Bounce regions in place
- Change the gain of audio regions
- Create regions in the Tracks area
- Convert a MIDI region to a Session Player region or a pattern region
- Replace a MIDI region with a Session Player region in Logic Pro for iPad
- Rename regions
- Change the color of regions
- Delete regions
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- Intro to chords
- Add and delete chords
- Select chords
- Cut, copy, and paste chords
- Move and resize chords
- Loop chords on the Chord track
- Color chords on the Chord track
- Edit chords
- Work with chord groups
- Use chord progressions
- Change the chord rhythm
- Choose which chords a Session Player region follows
- Analyze the key signature of a range of chords
- Create fades on audio regions
- Extract vocal and instrumental stems with Stem Splitter
- Access mixing functions using the Fader
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- Intro to Step Sequencer
- Use Step Sequencer with Drum Machine Designer
- Record Step Sequencer patterns live
- Step record Step Sequencer patterns
- Load and save patterns
- Modify pattern playback
- Edit steps
- Edit rows
- Edit Step Sequencer pattern, row, and step settings in the inspector
- Customize Step Sequencer
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- Intro to mixing
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- Channel strip types
- Channel strip controls
- Peak level display and clipping
- Set channel strip volume
- Set channel strip input format
- Set the output for a channel strip
- Set channel strip pan position
- Mute and solo channel strips
- Reorder channel strips in the Mixer in Logic Pro for iPad
- Replace a patch on a channel strip using drag and drop
- Work with plug-ins in the Mixer
- Search for plug-ins in the Mixer in Logic Pro for iPad
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- Effect plug-ins overview
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- Instrument plug-ins overview
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- ES2 overview
- Interface overview
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- Modulation overview
- Use the Mod Pad
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- Vector Envelope overview
- Use Vector Envelope points
- Use Vector Envelope solo and sustain points
- Set Vector Envelope segment times
- Vector Envelope XY pad controls
- Vector Envelope Actions menu
- Vector Envelope loop controls
- Vector Envelope point transition shapes
- Vector Envelope release phase behavior
- Use Vector Envelope time scaling
- Modulation source reference
- Via modulation source reference
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- Sample Alchemy overview
- Interface overview
- Add source material
- Save a preset
- Edit mode
- Play modes
- Source overview
- Synthesis modes
- Granular controls
- Additive effects
- Additive effect controls
- Spectral effect
- Spectral effect controls
- Filter module
- Low, bandpass, and highpass filters
- Comb PM filter
- Downsampler filter
- FM filter
- Envelope generators
- Mod Matrix
- Modulation routing
- Motion mode
- Trim mode
- More menu
- Sampler
- Studio Piano
- Copyright
EVOC 20 Polysynth in Logic Pro for iPad
EVOC 20 PS combines a vocoder with a polyphonic synthesizer and can be played in real time.
It can create classic vocoder sounds, made famous by groups such as Kraftwerk during the 1970s and 1980s. Vocoding remains popular in current electronic, hip-hop, R & B, and other music styles.
EVOC 20 PS “listens” to an incoming audio signal—typically of a spoken or sung performance—and imposes the sonic characteristics and level changes of this signal onto the integrated synthesizer.
When you play notes and chords with your MIDI keyboard, the internal synthesizer “sings” at the pitches of incoming MIDI notes, but with the articulations—level changes, vowel and consonant sounds—of the incoming audio signal. This results in the classic “singing robot” or “synthetic voice” sounds that vocoders are mainly known for.
EVOC 20 PS can also be used as a synthesizer, or it can be used for more subtle effects processing—such as the creation of relatively natural-sounding vocal harmonies from a solo voice performance. Not limited to vocal processing, you can also achieve interesting results by processing other audio material, such as drum or instrument loops.
The EVOC 20 PS interface is divided into five main parameter sections.
Synthesizer parameters: Control the polyphonic synthesizer of the EVOC 20 PS. See EVOC 20 PS synthesis overview.
Sidechain Analyser parameters: Determine how the input signal is analyzed and used by the EVOC 20 PS. See EVOC 20 PS sidechain analyser.
Vocoder Filter Bank parameters: Configure the analysis and synthesis filter banks. See EVOC 20 PS formant filter.
Un/Voiced Detection parameters: Control how EVOC 20 PS handles voiced and unvoiced signals. See EVOC 20 PS Un/Voiced detection.
Output parameters: Configure the output signal of the EVOC 20 PS. See EVOC 20 PS output parameters.
Global parameters: Set global tuning, bend range, and other controls. See EVOC 20 PS global parameters.
Set up EVOC 20 PS
To add EVOC 20 PS to your project, choose it from the Instrument > Synthesizer submenu in an Instrument channel strip or the Plug-ins area. See Intro to plug-ins. You also need to provide an audio signal as the analysis audio source, via a side chain.
Also see EVOC 20 PS performance tips.
In Logic Pro, insert EVOC 20 PS into the Instrument slot of an instrument channel strip.
Choose an input source from the Side Chain pop-up menu in the plug-in toolbar. This can be an audio track, live input, or bus.
EVOC 20 PS is now ready to accept incoming MIDI data and has been assigned to an input, audio track, or bus—via a side chain.
Start playback, and play your MIDI keyboard.
If applicable, mute the audio track serving as the side chain input.
Adjust the volume levels of EVOC 20 PS and the side chain source—if not muted—to meet your needs.
To further enhance the sound, adjust the knobs, sliders, and other controls, and insert other effect plug-ins.
User Guide conventions
Logic Pro for iPad plug-ins have two primary views:
Tile view, which shows a few key parameters in the Plug-ins area
Details view, where you can access all plug-in parameters
Throughout the guide, parameters available in Tile view are indicated by 
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