u/Maleficent_Quail_292

Hi everyone — I'm the developer of Solfa, a sheet-music transposition tool. I wanted to share a horn example and hear whether this would be useful to you.

The image shows the solo entrance from Mozart's Horn Concerto No. 3, K.447: an old scanned E-flat horn part, with the written notes transposed down a whole tone for F horn. The sounding pitch stays the same. The idea is to keep the original printed look instead of rebuilding the page in notation software.

I know transposing at sight is part of horn playing. This is for the times when you'd actually prefer to have a printed part in F — for a student, rehearsal, or your own practice.

These are matching crops from the original scan and the actual full-page output, with no manual notation corrections. It's still beta and needs proofreading: the original "Horn in E-flat" heading isn't automatically updated, and I noticed rehearsal letters elsewhere on this page being mistaken for chord symbols.

You can try it at https://solfa-music.com. New users get two free page credits after phone verification, and you can inspect a preview before deciding whether to spend a credit. Further credits are paid.

Which old horn parts would you most often want a printed F-horn version of?

Source: the public-domain Kling/Breitkopf & Härtel part, IMSLP #14243: https://imslp.org/wiki/Horn_Concerto_No._3_K.447_(Mozart,_Wolfgang_Amadeus)

Hi, I'm the developer of Solfa. I built it for situations where you have a photo, scan, or PDF of notated music in the wrong key and don't want to re-enter the whole part in notation software. It moves the notes on the original page while keeping the layout, lyrics, and handwritten markings. One possible concert-band use is preparing a part for B-flat clarinet or trumpet from concert-pitch notation.

It's still in beta. Clear scans work best, and it can miss notes or chord symbols, so please check any result before using it in rehearsal. Chord letters are transposed when the symbols are recognized. You can preview the first system for free. New users get two free credits, enough for two full pages; after that, a full page uses one credit.

https://solfa-music.com/

For players or directors who prepare parts: would this be useful in your workflow? What kind of notation error would make an automated transposition unusable for you?

I just launched KeepMePosted Platipus on iPhone, alongside the Android version.

The app tracks slow-moving topics for you. You create a topic in plain language, choose a cadence, and it sends a short source-backed update when something meaningful changes.

I am trying to figure out which positioning is clearest:

1. Google Alerts, but smarter

2. AI topic tracking for things you do not want to check manually

3. Set a topic once. Get updates when something meaningful changes.

Use cases I am testing:

- AI/product launches

- EU AI Act or regulation updates

- company/earnings news

- sports transfer rumors

- local issues

- court cases or legal updates

I would love feedback on the positioning and first-use flow.

iPhone:

https://apps.apple.com/us/app/keepmeposted-platipus/id6761421685

Android:

https://play.google.com/store/apps/details?id=com.mischapps.keepmeposted

I just launched KeepMePosted and I am looking for feedback on the first-use flow.

The app is for tracking slow-moving topics. You create a topic in plain language, choose how often it should be checked, and the app sends a short source-backed update when something meaningful changes.

Good test topics could be:

- OpenAI / Anthropic / Google model releases

- EU AI Act updates

- a company or earnings topic

- a sports transfer rumor

- a local issue

- a court case or legal update

What I would love feedback on:

1. Is creating the first topic clear?

2. Does the first update feel useful?

3. What topic would you personally track?

Android:

https://play.google.com/store/apps/details?id=com.mischapps.keepmeposted

iPhone:

https://apps.apple.com/us/app/keepmeposted-platipus/id6761421685