What are TimeStretch Player and Analog Film Emulator on 29a.ch?

TimeStretch Player and Analog Film Emulator are two browser-based experiments on 29a.ch, the personal website of Jonas Wagner. TimeStretch Player is an audio player that can change the speed and pitch of audio independently. Analog Film Emulator is a tool that emulates the look of analog film. Both sit alongside other experiments on the site, including Forensically (photo forensics tools) and Neonflames (draw your own nebula in the browser).

TimeStretch Player

TimeStretch Player is an audio player built around independent control of speed and pitch. In a normal player, slowing audio down also lowers its pitch, and speeding it up raises it. TimeStretch Player separates the two, so you can change one without the other.

That distinction is what makes it useful for tasks such as:

• Learning a piece of music by ear — slow a passage down to hear each note clearly while keeping the pitch at the original level.
• Practicing an instrument or transcription — loop and slow a section without the track turning into a low, muddy drone.
• Checking how a recording sounds at a different tempo — raise or lower speed while holding pitch steady, or shift pitch while keeping the tempo.

Because it runs in the browser, there is nothing to install; you load audio and adjust the controls directly on the page.

Analog Film Emulator

Analog Film Emulator is a tool for emulating the look of analog film. Instead of describing a single fixed filter, it is framed as an emulator — a way to approximate the color, tone, and character associated with film stock rather than a digital capture.

Typical reasons to reach for a tool like this:

• Giving digital photos a film-like grade without shooting or scanning actual film.
• Comparing looks across different film-style treatments before committing to one.
• Quick visual experiments where you want a film aesthetic but do not need a full editing suite.

As with TimeStretch Player, it is a browser experiment on 29a.ch rather than a packaged desktop application.

How they fit into 29a.ch

Both tools belong to the site's Experiments section, which collects interactive browser projects by Jonas Wagner. The same section lists:

The experiments share a common approach: each is a focused, self-contained tool you open in a browser and use directly, with no account or install described on the site.

Choosing between them

The two tools solve unrelated problems, so the choice depends on what you are working with:

• Working with audio — use TimeStretch Player when you need to change playback speed and pitch separately.
• Working with images — use Analog Film Emulator when you want a film-style look applied to a photo.
• Working with photo authenticity or metadata — that is Forensically's area, not either of these two.

If your goal is simply to understand what the site offers, the Experiments section is the entry point; TimeStretch Player and Analog Film Emulator are two of the interactive tools listed there.