Broadcast Audio Processor

Burn through the dial: Loud, punchy, and clean.

Hear the difference

Blowtorch is a complete broadcast processor for macOS, Windows and Linux, built for FM and streaming.

10
Processing stages
5
AGC and Multiband frequency bands
60fps
Live meter refresh
192kHz
MPX composite output
0s
Silence during updates

Listen

Hear the difference

Flip between dry tracks normalized to −14 LUFS and Blowtorch in real time.

LoudnessLUFS
Flip the switch live while it plays. 0:00 / 0:31

AI-generated tracks normalized to −14 LUFS, processed offline with one of the loud presets, nothing else.

Chain

Forged in ten stages

Every stage in your order of preference.

  1. Input

    Highpass, lowpass filters and phase rotator.

  2. AGC

    Rides the level. Run as wideband, two-band or five-band.

  3. Side Channel EQ

    Three-band EQ to lift stereo brightness.

  4. EQ

    Five bands of clean equalization.

  5. Bass

    Low-end enhancement felt on small speakers.

  6. Multiband

    Five bands with warmth and bass clipping.

  7. Color

    Air and Presence exciter: Tube, Tape, Transistor.

  8. Clippers

    Oversampled clipping that removes its own distortion.

  9. Limiter

    True-peak lookahead, wideband or two-band.

  10. Loudness

    Trims toward target LUFS.

Follows your order

Drag any stage anywhere: arrange for Streaming, FM, and remove unneeded stages.

↔ Drag stages into your order.

    One Chain, Multiple Outputs

    Assign ultra low latency outputs and broadcast outputs with more generous lookahead time.

    1. Input
    2. AGC
    3. Stereo EQ
    4. EQ
    5. Bass
    6. Multiband
    7. Color
    Low latencyClippers · Limiter · Output
    Direct Monitoring

    Dedicated monitoring output for realtime listening.

    LookaheadLookahead · Clippers · Limiter · Output
    Streaming and FM

    Slow leveler eases peaks ahead for Streaming and FM.

    Streaming

    Streaming in and out

    Route apps, devices and files without cables or virtual devices.

    In
    Physical inputsAny sound card input
    StreamingHTTP · AES67 · HLS · RTSP
    AppsPlayout or browser audio
    FilesProcess one-off
    Out
    Any sound card outputPhysical outputs
    HTTP · AES67 · Icecast · ShoutcastStreaming
    192 kHz with RDSMPX
    Save as PCMFiles
    MP3AAC-LCHE-AACOpusFLACPCM

    No sound card required.

    FM

    Engineered for FM

    FM-ready processing, streaming from the same chain.

    • 192 kHz stereo MPX composite output
    • 50 µs or 75 µs pre-emphasis
    • Clippers hold the pre-emphasized ceiling
    • Supports RDS and RadioText
    MPX · 192 kHz0 – 60 kHz

    AI

    AI if you want it

    Built-in MCP server lets your favorite AI tool help adjust settings live.

    • Read every parameter and live meter
    • Change settings and save preset snapshots
    • Asks you what you hear dialing in

    Disabled by default.

    Console

    Total Control

    Control every stage directly with live visual metering, even remote.

    The Multiband window: depth, band coupling and gate above; below, five bands drawn over the live input and output spectrum with each band's gain reduction, crossovers at 100 Hz, 480 Hz, 1.7 kHz and 6 kHz, and per-band attack and release.
    Neural Music/Speech Detection

    Detects speech and music live

    A local AI neural network detects speech or music. If enabled, the bass clipper eases off during speech.

    Real model and pullback output from a recorded run.

    Five Signature Sounds

    Comes with five factory presets. Create, save, and export your own complete setups.

    Preset

    Classical

    Wide dynamics, kept

    Preset

    Pop

    Bright, dense, consistent

    Preset

    Rock

    Thick and warm

    Preset

    Talk

    Speech, steady and clear

    Preset

    Loud

    Everything on and pushed

    Built to Stay On Air

    Gapless Updates deliver processing improvements with zero downtime.

    Gapless Updates

    Switch to newer versions of Blowtorch without taking the station off air.

    Locked clocks

    Software clocks keep every output locked without clicks.

    Fire up your station

    Blowtorch is coming soon to macOS, Windows and Linux.

    macOSWindowsLinux