Four girls · audio & music production · good stuff
OH SISTERS油头姐妹
We build the tools nobody made for us.
Read your message, replied with nonsense. Mental state: excellent. We really do have jobs. Show some respect — these are four client-daddies. We will be together forever, like sparrows on the same power line.
The tools
Six of them · all free · all oursOnyx音频播放器
100% of users worldwide agree this is the best audio player ever made.
We ran a survey. (The survey population was the four of us.)
Acknowledge
Music音乐手册
A full music handbook, for everyone.
Everything we had to learn sideways, from strangers, at 2am — written down properly this time, in an order that makes sense.
Senra森罗 · 塔罗与占卜
Tarot and fortune telling, calculated properly.
Our own divination house. We are trying to make divination rigorous, scientific and correctly calculated — the occult deserves unit tests too. Every sound and every note in it was built by hand, by us.
JustPiano托盘钢琴
A minimal piano in your tray.
Lives in the menu bar, silent until you want it, and speaks the moment you touch a MIDI key or click with the mouse. Close it before anyone notices you were checking whether that note was really a B♭.
JustConvert格式转换
Converts anything into anything.
Documents, video, audio — drop it in, take it out in the format you actually needed. There is also one feature we left out of the description: paste the link to an online video and it converts that too.
Msg2Note消息转笔记
Telegram messages, straight into local markdown.
No LLM, no middleman, no service in between — the message goes from your phone to your own disk and stops there. Jot a line down on the way home and let the agent on your machine pick it up.
House rules
Non-negotiable-
Subscribed to an LLM? Then burn every token.
The money is already gone. Leaving tokens unspent is losing twice.
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Either it is fun, or it saves us work.
You cannot step into the same river twice. (Is that relevant?)
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Collect the least information, do the most.
No accounts, no tracking, no newsletter. We do not want your email address.
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Study hard. Wash your hair every day.
Historically we manage one of the two.
Who we are
Four girls living in Shanghai who have known each other for over ten years, all of us working in music and audio. Friends since university — complaining together, slacking off together, poking at the world together.
Some of the steps we use every day simply have no decent tool. You have probably wanted the same ones — so here is our little corner, and everything we finish gets left here for you.