Logic Pro Vocal Setup

A tool that downloads a track, analyzes its audio characteristics, and generates per-song Logic Pro plugin settings for vocal practice.

qobuz-to-logic.py takes a song name, searches Qobuz for the track, downloads it as a hi-res FLAC, converts it to a 24-bit WAV, and analyzes the audio to derive recommended plugin settings for your vocal chain in Logic Pro. It generates settings for two microphones simultaneously — a Rode NT1 5th Gen for voice practice and a Shure Beta 58A for stage presence work — so you can switch between them without re-running the script.

The analysis measures BPM, spectral brightness, RMS energy, and low-mid density to determine EQ curves, compressor behavior, reverb type and amount, delay recommendations, and backing track levels on a per-song basis. Song metadata (BPM, key, time signature) is sourced from GetSongBPM when available, with local audio analysis as a fallback.

Noise Gate → Channel EQ → De-Esser 2 → Compressor → [Tape Delay] → ChromaVerb → Adaptive Limiter

Rode NT1 5th Gen — Voice Practice Shure Beta 58A — Stage Presence

Documentation

The Core Method: Extreme-Then-Dial-Back

The fastest way to learn what any parameter does:

Push it to an extreme — crank the EQ to +10 dB, slam the compressor to -35 dB, wet the reverb to 50%
Listen to how bad it sounds — identify the specific quality that makes it bad
Dial it back toward the recommended setting and notice when that bad quality disappears
Your target is just past that point — where the benefit is present but the downside isn't

Once you know what "too much 5 kHz" sounds like, you'll recognize it instantly in future sessions.

What to Listen For (Per Plugin)

Noise Gate

Condition	What You Hear
Threshold too high	Beginnings of words get chopped — soft consonants ("th", "wh", "f") disappear. Sounds like someone hitting a mute button mid-word.
Threshold too low	Room hum, air conditioning, or mic hiss bleeds between phrases.
Just right	Quietest phrase in the song comes through cleanly. No noise between phrases.

Channel EQ — High Pass (Band 1)

Condition	What You Hear
Cutoff too high	Voice loses chest resonance — sounds thin, hollow, "telephone-like".
Cutoff too low	Low-frequency wooliness, voice sounds boomy or boxy.
Just right	Rumble and handling noise gone, but chest voice still has body.

Channel EQ — 300 Hz Cut (Band 3)

Condition	What You Hear
Too much cut	Low-mids sound hollow, voice loses warmth.
Not enough cut	"Mud" — muffled, boxy quality. Words lose clarity.
Just right	Voice is clear and defined without sounding thin.

Channel EQ — 5 kHz Boost (Band 5)

Condition	What You Hear
Too much boost	Brittle, fatiguing. S and T sounds become piercing.
Not enough boost	Voice sits behind instruments. Words are hard to understand.
Just right	Voice moves forward in the mix. Consonants are crisp but nothing stings.

Compressor

Condition	What You Hear
Over-compressed	Vocal loses its life. Loud and quiet notes are the same volume. May hear audible "pumping".
Under-compressed	Vocal jumps out on loud phrases, disappears on quiet ones.
Just right	Vocal sits evenly but still has dynamic expression.

ChromaVerb

Condition	What You Hear
Too wet	Words become indistinct. Voice sounds distant, like a cave.
Too dry	Voice sounds disconnected from the music. Sterile, exposed.
Just right	You feel the space more than hear it. Voice sits inside the mix.

A/B Testing Rules

One change at a time — if you change two things, you won't know which made the difference
Always test with the backing track playing — never solo the vocal
Level-match before comparing — louder always sounds "better" to the brain
Switch frequently — ears adapt within 30–60 seconds
Use the bypass button — toggle each plugin on/off
Check on speakers, not just headphones — headphones exaggerate reverb

Per-Genre Compression

Genre	Ratio	Attack	Release
Ballads	2:1–3:1	20–30 ms	100–200 ms
Mid-tempo rock	4:1	10–15 ms	40–80 ms
Fast/aggressive	4:1–6:1	5–10 ms	30–50 ms
Pop punk	4:1	10–20 ms	60–100 ms

ChromaVerb Algorithm by Genre

Algorithm	Best For
Plate	Rock, pop rock — bright, dense, standard for rock vocals
Hall	Epic ballads, emotional climaxes — grandeur and space
Room	Garage rock, punk — natural, close, like a live venue

Common Mistakes

Too much reverb — the #1 beginner mistake. Reverb should be felt more than heard.
EQing in solo — a vocal that sounds perfect soloed may fight with the guitars.
Boosting too much — +2 to +3 dB is almost always sufficient.
Attack too fast — below 5 ms shaves off transients that give vocals punch.
Mixing too loud — if the vocal sits well at low volume, it'll sit well at any volume.
Not taking breaks — ear fatigue sets in after 30–45 minutes.

Architecture

Loupedeck CT (MIDI CC) → Logic Pro Smart Controls → Plugin Parameters

The Loupedeck sends MIDI CC messages. Smart Controls receive them and route to plugin parameters. Map the hardware once, remap plugins through Smart Controls if the chain changes.

Two-Track Mic Switching

Instead of loading channel strip presets (which causes an audio gap), create two tracks with the same input — one per mic. Mute/unmute to switch instantly.

Track	Channel Strip	Status
Vocal - NT1	Full chain, NT1 baseline	Unmuted when using NT1
Vocal - Beta 58A	Full chain, Beta 58A baseline	Unmuted when using Beta 58A
Backing Track	Stereo audio	Always on

Recommended Dial Mapping

6 Physical Dials

Dial	Parameter	Range
1	Compressor Threshold	-35 to -5 dB
2	ChromaVerb Wet	0% to 50%
3	Backing Track Level	-inf to 0 dB
4	De-Esser Sensitivity	0% to 100%
5	EQ Band 3 Gain (300 Hz)	-8 to 0 dB
6	Monitor Output	-inf to 0 dB

Touch Screen Buttons

Button	Action
Page 1	Tape Delay bypass, Noise Gate bypass, secondary knobs
Page 2	Mute/Unmute NT1, Mute/Unmute Beta 58A, Bypass All FX

Setup Steps

In Loupedeck software, create a custom Logic Pro profile with MIDI CC actions on each dial
In Logic, press B to open Smart Controls on each vocal track
Map each Smart Control knob to a plugin parameter with constrained min/max ranges
Click External Assignment → Learn → move the Loupedeck dial to bind
Save as a channel strip preset to persist the mapping

Tips

Constrain dial ranges — prevents accidentally slamming threshold to -40 dB or reverb to 100%
Color-code the touch screen — blue for reverb, orange for dynamics, green for EQ
Save per-song presets once you've dialed in settings you like

Use MainStage

MainStage ($29.99) is Apple's live performance companion to Logic Pro. Same plugins, same engine, but organized around patches and setlists. Your Logic Pro channel strip settings transfer directly.

	Logic Pro	MainStage
Purpose	Recording/production	Live performance
Song switching	Open new project (slow)	Select next patch (instant)
Per-song settings	Manual recall	Auto-loaded per patch
Backing tracks	Timeline audio track	Playback plugin per song
Price	$299	$29.99

Practice vs Live Settings

Plugin	Practice	Live
Gate Threshold	-35 dB	-25 to -20 dB
EQ High Pass	80-100 Hz	100-120 Hz
EQ 300 Hz cut	-3 dB	-4 to -5 dB
EQ 5 kHz boost	+2-3 dB	+1-2 dB
Comp Threshold	-20 to -24 dB	-18 to -15 dB
ChromaVerb Wet	13-22%	8-12%
ChromaVerb Decay	0.5-1.0s	0.5-0.7s
ChromaVerb Algo	Per-song	Plate (default)

Reliability Tiers

Tier 1 — Start here: MacBook + MainStage handles vocal processing and backing tracks. Scarlett 2i2 as the interface. Single system.

Tier 2: Hardware vocal processor (TC-Helicon VoiceLive) handles vocals. MainStage handles backing tracks only. If laptop crashes, vocals stay live.

Tier 3: iConnectivity PlayAUDIO12 with two synced laptops + hardware vocal processor. Full redundancy.

Pre-Show Checklist

MacBook on AC power (surge protector)
Sleep, screen saver, notifications, auto-updates disabled
Close all apps except MainStage
Buffer size: 64 or 128 samples
Low Latency Mode: On
Test every patch in the setlist
Verify Scarlett 2i2 connection is stable