Hakaru

Pianist and indie iOS developer. I build audio apps for musicians who want pro quality without complexity.
Currently working on 1Take.

[Hakaru @hakaru]

iPhoneで映像と音声を完全同期録音できるアプリ「1Take」のベータテスターを募集しています。

カメラ録音 × 高音質オーディオを同時キャプチャ
録音後に音量バランスをそのまま調整
ライブ・リハーサル・練習動画の撮影に最適

https://t.co/ScsJ2wj88r

[Hakaru @hakaru]

あなたの Mac Studio が、調理器具になる。

最大調理温度 65℃ (M3 Ultra GPU 100%連続稼働時) 70B ローカル LLM 推論で約8分で到達

¥12,800 から。。

https://t.co/dhTerTBKwt

[Hakaru @hakaru]

Introducing MacSlowCooker Cooking Plate.

Your Mac Studio. Now a cooking appliance.

　Max temp: 149°F under sustained 100% GPU.
~8 min to heat during 70B local LLM inference.

From $89. (Not a real product.)

https://t.co/dhTerTBKwt

[Hakaru @hakaru]

Mac の上に載せた鍋の温度管理に困っていませんか？
GPU 回すと炎、温度上がると鍋が赤く、ファンに連動してして湯気がモコモコ。MRTG風履歴管理
https://t.co/HVS5RF0EZk

[Hakaru @hakaru]

Cook with your GPU. Wrote up MacSlowCooker — a macOS app where the Dock icon is a cooking pot. GPU busy → bigger flame, SoC hot → pot turns red, fans spin
→ steam puffs. Added an MRTG-style (1995!) history viewer.

https://t.co/dhTerTBKwt

[Hakaru @hakaru]

Woke up to find 1Take featured in 월간 믹싱, a Korean music production magazine.
They covered the compressors, VU metering, hands-free recording. No PR, no outreach — just organic coverage.
Solo dev moments.

https://t.co/CDlRrPAHZQ

[Hakaru @hakaru]

1Take Pro beta is live 🎬

Sync audio+video across multiple iPhones — one tap over Wi-Fi, clips arrive in your editor already aligned. No hardware needed.

BWF output · All Pro features unlocked (free)
📱 iOS 18+ 👉 https://t.co/ScsJ2wj88r
#iOS #MultiCamera #TestFlight

[Hakaru @hakaru]

Zenn公式さんにもピックアップしていただきました：
M2DX のパブリックTestFlightベータはこちらから試せます：
https://t.co/zqd0ZEkOMd

[Zenn公式 @zenn_dev]

🎹 ピックアップ ✨

DX7のFM音源をSwiftで再実装した著者が、MSFAの解析から得た知見や、固定小数点演算、エンベロープの非線形性など、実機再現の苦労を詳細に解説しています。

https://t.co/Kf7GAGB7JS

[Zenn公式 @zenn_dev]

🎹 ピックアップ ✨

DX7のFM音源をSwiftで再実装した著者が、MSFAの解析から得た知見や、固定小数点演算、エンベロープの非線形性など、実機再現の苦労を詳細に解説しています。

https://t.co/Kf7GAGB7JS

[Hakaru @hakaru]

M2DXのパブリックTestFlightベータを公開しました🎹

DX7互換FMシンセ (6op × 32algo)、MIDI 2.0 UMP完全対応、Pure Swift 6でmsfa/Dexedコアを移植。低レイテンシCoreAudio直結。

iOS/iPadOS 18+

https://t.co/6OZ3f7AGOJ

#FMsynth #DX7

[Hakaru @hakaru]

M2DX β is open — a MIDI 2.0 × DX7-compatible FM synth for iOS, in pure Swift.

• 1,633 factory presets
• MIDI 2.0 （Testing)
• Crash reports auto-sent to me (please break it)

https://t.co/zqd0ZEkOMd

[Hakaru @hakaru]

Mac Pro 5,1, dual Xeon, 128GB ECC RAM, Ubuntu.
Got the RTX 2060 Super in. It outputs video — I'm literally typing this from it. But nvidia-smi gives me:
　　RmInitAdapter failed! (0x24:0x1c:1707)
No CUDA, no compute. Just a very expensive display adapter.

[Hakaru @hakaru]

https://t.co/PF8t0gm7Yc

1Take v1.4.1 is now available on the App Store. This update refines the AI auto-optimization feature with Pro subscription gating and fixes critical bugs affecting audio processing and cloud sync.

[Hakaru @hakaru]

🎙️ 1Take is now on @KVRAudio!

Real-time Noise Gate, EQ, Compressor & Limiter as you record. 30s pre-roll so you never miss the start.

Free (Pro: $4.99)
https://t.co/55C2vYLXK0

#AudioDev #MusicProduction

[Hakaru @hakaru]

1/ The MIDI 2.0 spec looks clean on paper. Then you implement it — Mcoded7 bugs, request ID exhaustion, vendors ignoring half the spec.

[Hakaru @hakaru]

I built a MIDI 2.0 library for Swift. It started as "just an iPhone MIDI controller" — then came broken specs, KORG reverse engineering, BLE mysteries, and Apple's half-finished APIs.

The full 10-part story:
https://t.co/aTLnMH07PP

[Hakaru @hakaru]

https://t.co/y6opeGjwbb

MIDI 2.0の闇と戦う — SimpleMidiControllerからMIDI2Kit開発まで

[Hakaru @hakaru]

NAM Capture — build your own amp/pedal models.

Captures the input/output WAV pair needed for Neural Amp Modeler training. Just run a sweep through your amp and hit record.

Frame sync, 96kHz → 48kHz resampling, and matched WAV export — all automatic.

[Hakaru @hakaru]

SonicDNA Collector v1.1.0 is here.

Turn your iPhone + USB audio interface into a professional IR capture and NAM training rig for your analog gear.

https://t.co/luXhePixAJ

https://t.co/T8ONrV3tP5

[Hakaru @hakaru]

R Capture — make your own cabinet IRs with an iPhone.

Plays a 96kHz/24bit ESS sweep through your audio interface, records the result, and extracts a precise impulse response via Farina deconvolution.