OJSoft.fr — Software for live sound

Precision tools for the people who run the show.

Two pieces of pro-audio software, built by a working engineer. PA TOOLS puts a field toolkit in your pocket. PATCHER turns patch lists, stage plots and the whole touring advance into a few minutes in the browser.

Explore PA TOOLS → Explore PATCHER →
PA TOOLS iOS app
iOS App

PA TOOLS

An SPL meter, signal generator, cable & power calculator, system alignment, recorder and speaker database — the field toolkit for sound engineers.

See the toolbox → Web App

PATCHER

Build input/output lists, multi-band festival patches and drag-and-drop stage plots in your browser — then advance the whole tour and share it with the crew.

See how it works →
PA TOOLS iOS

Audio Tools for Audio Nerds

Everything you reach for on a show day, in one app. Measure the room, generate test signals, size your cabling, pre-align the PA, record references and look up speaker specs — offline, on stage, in your pocket.

01Built for the field. Works offline, dark by default, fast under pressure.
02Metrology you can trust. Calibrated SPL, real signal generation, proper math.
03One app, the whole toolbox. Thirteen instruments under a single home screen.
Now in public beta onTestFlight Beta test
PA TOOLS — Audio Tools for Audio Nerds

The toolbox.

Thirteen instruments. One home screen.

SPL Meter screen
SPL Meter

Know your level

Live SPL with Fast, Slow, Leq and Peak. Log a session, watch the trend, export the data.

Signal Generator screen
Signal Generator

Make the noise

Pink & white noise, tones, sweeps, bursts and calibration signals with automated frequency drops.

Cable Calculator screen
Cable Calculator

Size the run

Power-cable cross-section from current, length and voltage — with voltage drop and AWG conversion.

Sub Array designer screen
Sub Array

Steer the lows

Delays and spacing for arc and line sub arrays, from coverage angle, frequency and air temperature.

System Prealignment screen
System Prealignment

Start aligned

Factory delay, phase and gain presets for common system combinations — before you ever open the analyser.

Speaker Load calculator screen
Speaker Load

Load the amps

Channel counts, boxes per output and max SPL per enclosure for amplified speaker configurations.

Recorder screen
Recorder

Capture it

24-bit / 48 kHz stereo WAV with live metering, markers and USB-interface input for console capture.

Reference Player screen
Reference Player

Play the reference

A library of reference tracks and test files with looping, waveform editing and instant recall.

Speaker database detail screen
Speaker Database

Look it up

Specs, coverage, dimensions and applications for touring loudspeakers — straight from the manufacturers.

Phase Checker screen
Phase Checker

Check the polarity

Fire an impulse through the rig and read the first captured peak — positive is in phase, negative flags reversed wiring or polarity.

Delay Finder screen
Delay Finder

Time the flight

Measure time-of-flight between your farthest and nearest systems, then get a recommended delay alignment you can copy straight to the processor.

Wave Length tool screen
Wave Length

See the wave

Wavelength, λ/2 and λ/4, period and phase rotation per metre for any frequency — with a live waveform plot and temperature-aware speed of sound.

RTA

Read the room

A real-time analyser with selectable weighting and fractional-octave resolution. Overlay a live capture against a stored reference to see exactly where the room is fighting you — from 20 Hz to 20 kHz.

RTA real-time analyser screen
PATCHER Web

Patch lists, stage plots and the whole advance — in your browser.

Stop rebuilding the same spreadsheet for every gig. PATCHER lays out inputs and outputs, patches a whole festival across multiple bands, and draws a stage plot the crew can actually read — and now runs your touring advance, with venues filling in their own details. All saved, exportable and shareable.

Open PATCHER →
patcher.fr
PATCHER drag-and-drop stage plot editor
01 — Inputs & outputs

Every channel, accounted for.

Lay out your inputs and outputs the way the console sees them. Mics, DIs, stands, phantom power, groups, monitor sends and notes — fielded, color-coded and editable inline.

  • Source, mic/DI and alternate per channel
  • 48 V, stand type, group and destination
  • Annotations, mutes and solos that carry through
patcher.fr / inputs
PATCHER input list
02 — Multi-band patching

One patch. The whole festival.

Share a single input list across every act on the bill, then flag exactly who uses what. The multi-band matrix shows every band's patch at a glance, color-coded so nothing gets lost at line check.

  • Add bands and assign channels per act
  • Live channel counts per band
  • One source of truth for the whole day
patcher.fr / multi-band
PATCHER multi-band festival patch
03 — Stage plot

A stage plot the crew can read.

Drag instruments, monitors, risers and tech onto a scaled stage. Snap to grid, rotate, label and zone — everything tied back to your patch, so the plot and the channel list never drift apart.

  • Drag-and-drop library of performers, instruments & monitoring
  • Grid snapping, rotation and zones
  • Channel numbers pulled straight from the patch
patcher.fr / stage-plot
PATCHER output and monitor list
04 — Templates

Start from a template, not a blank page.

Drums, bass, guitars, keys, strings, brass, vocals, comms — ready-made input templates you drop in and tweak. Build a festival rig in minutes and save your own for next time.

  • Curated input & output template library
  • Filter by instrument family
  • Save custom templates to reuse
patcher.fr / templates
PATCHER template library
● New in PATCHER

From the first advance to the last downbeat.

PATCHER now runs the whole tour, not just the patch. Plan every date, let venues complete their own details, and keep the stage and FOH talking on the night.

Touring

Tour dashboard

Every show, its status and advancing progress in one table.

Venue Portal

Venues self-serve

A no-login link the venue fills in — answers flow straight back to you.

Floor Comms

Stage ↔ FOH

Per-channel flags and live chat from line check to showtime.

05 — Touring New

Every show on the run, in one place.

Plan the whole tour from a single dashboard. Add each date, track advancing progress per show, and see at a glance which venues have replied — and which still owe you answers.

  • Show table with status, venue replies and a confirmed-items progress bar
  • Filter by open or done, search any date, city or venue
  • Reusable checklist template copied into every new show
patcher.fr / touring
All Open Done
Search shows…
DateCityVenueStatusRepliesConfirmed
14 JunParisLa CigaleDone4
16 JunLyonLe TransbordeurOpen2
18 JunToulouseLe BikiniOpen0
21 JunBordeauxRock SchoolOpen5
23 JunNantesStereoluxDone3
06 — Advancing & Venue Portal New

Let the venue fill in the blanks.

Generate a private link and the venue completes load-in, power, PA and parking themselves — no account, no app. Their answers land straight back in your show, flagged the moment something's new.

  • Public token link — the venue fills it in from any browser
  • Confirm each item, with production notes and venue replies side by side
  • Optionally share inputs, outputs, artists, stage plot and gear list
patcher.fr / venue / ab12cd
7 / 9 confirmed
Load-in time
09:00 — dock B, ring buzzer
✓ Confirmed
House PA
Prod note: we carry control, need your amp racks + delays.
Type your answer…
Confirm
Stage power
3× 32A 3-phase, SL + SR
✓ Confirmed
Parking
Type your answer…
Confirm
✓ Submit replies ⬇ Save as PDF
07 — Floor Comms New

Talk to the stage, channel by channel.

Stage techs open a read-only link, flag any channel and chat with FOH in real time. Flags move from unread to in-progress to resolved, so nothing slips between line check and downbeat.

  • Per-channel flags: unread → in progress → resolved
  • Live admin ↔ stage chat, shareable by link
  • Read-only viewer for the whole crew
patcher.fr / floor-comms
12Lead VoxNo signal at the wedge →
24Drum OH LChecking cable run…
07Bass DIResolved · swapped DI
31IEM — GtrResolved
StageCh 12 still dead, trying a spare XLR
FOHCopy — patched to spare input 48, try now.

Build your next patch in the browser.

Free to try. Nothing to install. Works on any laptop.

Open PATCHER →
Contact

Questions, feedback, feature requests?

OJSoft is a one-person shop building for working sound engineers. If something's broken, missing or could be better — say so. Every message gets read.

patoolsapp@gmail.com
Email patoolsapp@gmail.com
PA TOOLS Join the beta →
PATCHER patcher.fr →