For sample pack makers & instrument sound designers
A finishing studio for your samples.
Rename, verify, and standardize entire packs in minutes — batch power with hand-edit precision.
Quality control for filenames and audio
The core idea
Filenames, treated as data.
Calder parses every filename into parts — instrument, key, tempo, take — not just a string of characters. Select a part across five hundred files and change it once. Move it, merge it, re-case it, or swap it from your pool. It's the batch power of a renamer with the precision of doing it by hand.
- Part-based selection, across any number of files
- Structure-aware: edit position, not pattern
- Every change previewed, every change undoable
Everything between bounce and release.
Filenames
Text Palette & Pool
Keep your working vocabulary on screen. Clipboard slots, reusable parts, and a pool of values you can apply anywhere.
Keyboard-first navigation
Folders under one hand, files under the other. Every action has a key — the mouse is optional.
Audio
Batch standards
Sample rate, bit depth, normalization, fades, silence — applied to a whole pack in one pass.
Tailmaker
Give truncated samples natural endings. Tails that sound designed, not chopped.
Export by transient
Slice a performance into regions at every hit and export each one as its own file.
Quality Control
Scan everything
Validate names, audio specs, loops, and notes against your rules. See every issue. Fix them in batch. Export the report.
For instrument designers
From folder to Serum 2 instrument.
Point Calder at a folder of multisamples. Fix the names, verify the keys and loop points, then generate an SFZ that loads straight into Serum 2's multisampler — or any SFZ-compatible sampler.
One price. No subscription.
- All features, forever
- Free updates
- Use on two machines
- 14-day full trial — no card required
Checkout opening soon — email for a license today.
macOS 13 Ventura or later.
Questions, answered.
What are the system requirements?
macOS 13 Ventura or later.
How does the trial work?
Download the app and use everything, free, for 14 days. No card, no account. A license key unlocks it permanently.
Will it handle a 50,000-file library?
Calder is optimized for sample packs and mid-size batches — hundreds to a few thousand files at a time. Very large libraries work, but scanning gets slow; big-library performance is on the roadmap.
Which samplers read the SFZs?
Anything SFZ-compatible: Serum 2's multisampler, sforzando, TAL-Sampler, and most modern soft samplers.
How many machines? What about updates?
One license covers two machines. Updates are free. If a paid major version ever ships, existing owners get a discount.
What if it's not for me?
Email within 14 days of purchase for a full refund.
Windows?
macOS only for now.
About the maker
Built by someone who ships samples.
Calder QC is made by Ben Bromley — a working audio professional who got tired of losing the last hours of every release to file cleanup. It's the tool he wanted, built properly.
More of Ben's work → benbromley.com