Exclusive Mode
Showboard uses CoreAudio HAL to take exclusive control of your DAC. The macOS mixer is bypassed entirely. No resampling, no volume normalization, no interference from system sounds or other apps. What the taper recorded is what hits your headphones.
Most music players on the Mac send audio through the system mixer, which resamples everything to a single output rate and applies its own processing. Showboard sidesteps all of that. The signal path is your file, the CoreAudio HAL driver, and your hardware. Nothing else touches the stream.
Automatic Sample Rate Switching
Your DAC switches to match every file. Play a 44.1 kHz soundboard from 1997, then a 192 kHz studio master, then a 96/24 audience recording from last weekend. Showboard handles the switching instantly. No manual trips to Audio MIDI Setup.
This is one of those things you stop thinking about once it works. The DAC locks to the native rate of each track as it starts. Your hardware does what it was designed to do, and you hear the difference on recordings where the sample rate actually matters.
Gapless Playback
Zero-gap transitions across all sources. The segue from Tweezer into Tweezer Reprise plays the way it happened. Local files and streams alike. If the band didn't stop, neither does Showboard.
Gapless isn't just a nice-to-have when you listen to live music. A gap in a continuous set breaks the illusion entirely. Showboard pre-buffers the next track and crossfades at the sample level so transitions are continuous whether you're playing local FLAC files or streaming from nugs.net.
Parametric EQ
10-band parametric equalizer with 6 presets. Tame a harsh audience recording or shape the low end of a soundboard. Adjust frequency, gain, and Q per band. Apply settings per-source or globally.
Not every recording sounds the same, and that's especially true with live music. A close-mic'd SBD from Red Rocks sounds nothing like an AUD from a small club. The parametric EQ gives you precise control without flattening the character of the recording.
Headphone Crossfeed
Blends the stereo field for headphone listening the way speakers do naturally. When you listen on speakers, each ear hears both channels with a slight delay and level difference. Crossfeed recreates that acoustic reality in your headphones.
The result: reduced fatigue on long listening sessions without sacrificing detail or imaging. Particularly noticeable on older audience recordings with hard-panned stereo. Three intensity levels let you dial in the amount that sounds right on your setup.
Format Support
If you have it, Showboard plays it.
Why Not the App Store?
Apple's App Store sandbox blocks the low-level CoreAudio HAL access that makes exclusive mode possible. A sandboxed app cannot take exclusive control of an audio device. That's the entire foundation of bit-perfect playback, and it's not negotiable.
Showboard is notarized by Apple, which means macOS has verified it for malware and security. Updates are delivered automatically through Sparkle, the same update framework used by apps like Firefox and VLC. Better sound was the priority. The App Store couldn't deliver it.