XR18 / X Air Acoustic Guitar starting point

Beginner Skill level for the five steps below.

Dial these in, then adjust by ear in the full mix. Feedback with pickups shows up as a low 'hum-swell' around 100-250 Hz. Cut that narrow-ish band rather than turning the whole channel down.

1High-pass filter

80-120 Hz (full band), ~60 Hz (solo/duo)

High-pass filter curve for acoustic guitar on XR18 / X AirLow Cut12 dB/oct0-12-24-3620501002005001k2kHzdB100 Hz

Illustration in the style of the XR18 / X Air (X Air Edit) low cut / HPF, not a screenshot. Drawn at 12 dB/oct; the shaded area is what gets cut. Drawn at 100 Hz, the middle of the card's 80-120 Hz. The card also lists ~60 Hz (solo.

In a band, the bass covers the lows; in a sparse set, keep more body.

On the XR18 / X Air: No surface: in X Air Edit (or Mixing Station), open the channel and use the Low Cut switch/frequency in the Config / Preamp area.

2Gate

Use
No

Not needed.

On the XR18 / X Air: Channel > Gate tab: enable, then Threshold, Range, Attack, Hold, Release. A key filter is available for frequency-conscious triggering.

3EQ

EQ curve for acoustic guitar on XR18 / X AirEqualizer20501002005001k2k5k10k20k-15-10-50+5+10+15dB / HzLC1234EQ curve for acoustic guitar on XR18 / X AirEqualizer20501002005001k5k20k-15-10-50+5+10+15LC1234
  • LC 100 Hz, 12 dB/oct
  • 1 Bell 175 Hz, -3.0 dB, Q 1.5
  • 2 Bell 1 kHz, -2.0 dB, Q 2.5
  • 3 Bell 4 kHz, +0.0 dB, Q 0.9
  • 4 High shelf 11 kHz, +1.5 dB

Illustration in the style of the XR18 / X Air (X Air Edit) EQ screen, not a screenshot. Curve shows the midpoint of the suggested ranges; HPF drawn at 12 dB/oct; where the card lists alternatives, the first is drawn; a band whose range runs from cut to boost sits at 0 dB.

FrequencyGainQ / widthWhy
100-250 Hz-2 to -4 dBMediumBoom/body build-up; also where feedback often starts with pickups.
~1 kHz-1 to -3 dBMedium-narrowPiezo 'quack'. Sweep to find it.
3-5 kHz0 dB (up to +3 dB if it lacks presence)WidePresence/strum definition. Start flat and add only if it lacks presence; too much makes it harsh.
10-12 kHz shelf+1 to +2 dBShelfSparkle/air.

On the XR18 / X Air: Channel > EQ tab: 4 parametric bands per input channel (shelf/peq modes on the outer bands).

4Compression

Compressor curve for acoustic guitar on XR18 / X AirCompressor3:1-40-40-30-30-20-20-10-1000Input level (dB)Output level (dB)1:1 = no compression−3.3 dB gain reductionon a −6 dB peakThreshold -11 dBexample, set by ear

Attack 10-20 ms · Release 100-250 ms (timing, not shown on graph)

Illustration in the style of the XR18 / X Air (X Air Edit) compressor screen, not a screenshot. The threshold is an example only: it is set so a −6 dB peak gets about 3.5 dB of gain reduction, the middle of the card's target. Set yours by ear while watching the gain reduction (GR) meter. Drawn hard-knee with no makeup gain. Attack and release shape timing and don't change this curve.

Ratio
3:1
Attack
10-20 ms
Release
100-250 ms
Gain reduction
3-4 dB

Strummed vs fingerpicked parts vary a lot in level.

On the XR18 / X Air: Channel > Dynamics tab: Threshold, Ratio, Knee, Attack, Hold, Release, makeup Gain and Mix (parallel).

5FX send

Small reverb send

FX send level for acoustic guitar on XR18 / X AirSendsChannel sends: Bus 1-6 and FX 1-4FX3+100−10−30−∞12345612-18 to -12 dB34Bus 1-6 (monitors)FX 1-4

Plate / small hall, about 1.4 s decay, send around -18 to -12 dB.

Illustration in the style of the XR18 / X Air (X Air Edit) sends view, not a screenshot. Bus numbering depends on how the venue file is patched; set the level by ear.

Pickups sound dry and boxy; a little reverb helps.

On the XR18 / X Air: X Air has 4 internal FX slots fed by dedicated FX sends (FX1-4) on every channel; set the send level on the channel's Sends tab and bring FX returns up on the FX return faders.

🎧 What to listen for

Feedback with pickups shows up as a low 'hum-swell' around 100-250 Hz. Cut that narrow-ish band rather than turning the whole channel down.

Common gear for Acoustic Guitar

  • Radial ProDI · Passive DI box
  • LR Baggs Venue DI · Acoustic preamp/DI

Scene / preset file

Coming later: downloadable XR18 / X Air channel preset for this card.

Sources

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