Independent software · Audio engineering

Adam Siemaszko

Implementations Lead at Slice · Maker of Meringo Labs

Every other player asked me to trust it.
I wanted one that could prove it.

Adam Siemaszko

Proof, not promises
═════════════════════════
 MERINGO · BIT-PERFECT
 1.28.5 · Qudelix 5K · 24/96
═════════════════════════

[Capture]
  iso pipe → DAC endpoint
  cb459147…295adf

[Source decode]
  same file, re-decoded
  cb459147…295adf

  BIT-IDENTICAL ✓

Anyone can claim their software works. Meringo captures its own audio output on-device and hands you a SHA-256 receipt proving the bits reached your DAC untouched. Same idea runs through everything I ship: don't ask to be trusted — hand over something checkable.

See a real receipt — verify it yourself →
~27restaurant shops deployed at Slice
2production apps shipped, solo
$9.99once · no subscription, no ads
SHA-256receipts, not marketing claims

How I build

AI-native, receipt-verified.

I don't hand-write the code anymore — I direct AI to build it, and I own every decision that matters: the lane the product wins, the honesty bar it holds, what it deliberately refuses to do, and whether it actually works on the device in my hand. AI is the instrument. The receipt is the accountability.

What I decide

  • The lane — win one thing cleanly, cede the rest (streaming, Plex, MQA)
  • The honesty bar — the label never says more than the signal can prove
  • The architecture and the trade-offs the product lives or dies on
  • What ships, what waits, and what gets cut entirely

What I verify

  • On real hardware — every release tuned and tested on a FiiO M21
  • With cryptographic receipts — SHA-256 capture vs. source, bit-for-bit
  • With blind, level-matched A/B and honest p-values, not vibes
  • In public — the proof is shareable so anyone can check my work

Why it matters: "built with AI" is table stakes now — everyone has the tools. The difference is whether the output survives scrutiny. I hold AI-directed work to a bar it can't fake: a paid product, shipped and running, that proves its own claims. That's the whole discipline.


Twenty years

One throughline: make the complex usable.

  1. The Steve Jobs era

    Apple Store — sales floor

    Learned the lesson everything since has been built on: technology only counts when the person in front of you actually gets it. The product is the moment it makes sense to a human.

  2. Enablement

    Corporate training programs

    Built the programs companies use to get whole teams up to speed on complicated systems — turning dense, intimidating software into something people can operate with confidence.

  3. Restaurant tech

    POS migrations & vendor operations

    Ran full Square→Toast point-of-sale migrations end to end — hardware, configuration, owner and staff training — and managed external vendors and MSPs to strict SLAs.

  4. Now · Slice

    Implementations Lead

    Deploying restaurant software into the field — ~27 shops live — where "it works on my machine" means nothing and "it works in a busy kitchen on a Friday night" is the only bar that counts.

  5. Now · Meringo Labs

    Meringo & Meringo Listen

    Solo-built and shipped two paid Android apps — an audiophile music player and an audiobook player — the part I do entirely on my own, directing AI and holding the output to a receipts standard.


What I build

Meringo

A bit-perfect music player for Android DAPs and audiophile phones. Plays your local files and your Jellyfin or Subsonic library, has a real parametric EQ workbench with measured headphone corrections by oratory1990 (via OPRA), and shows you exactly what happens to your audio on the way to your DAC — then lets you prove it. 7-day free trial, then $9.99 once. No subscription, no ads.

Meringo Now Playing screen — 24-bit / 96 kHz, bit-perfect route

Meringo Listen

A premium Android audiobook player for people who own their books. First-class Audiobookshelf support alongside local M4B, MP3 and FLAC, a real 10-band voice EQ, pitch-corrected speed up to 3×, and per-narrator EQ memory. $14.99 once — no subscription, no ads, no tracking.


Work with me

I'm an AI-native product builder and operator — two decades getting complex technology to make sense to the people using it, and a shipped, paid product that proves its own claims. If you're building something where shipping fast and being provably right both matter, I'd like to hear about it.


Notes

Field notes on shipping provable software.

War stories from building Meringo — the bugs, the fixes, and the proof each one actually worked.

First entries soon

Support the work

Meringo is built by one person.

No investors, no ads, no data selling, no subscription. Just a one-time price and a lot of late nights. If the app earned a spot on your DAP and you feel like buying me a coffee toward the next feature, it helps more than you'd think. No pressure, ever.

— Adam

Buy me a coffee on Ko-fi