Taperlark / Field notes
Product notes, practical guides, and the decisions behind the apps.
Every Taperlark app keeps its own notes on its own hub, written as guides, release notes, comparisons, and explainers. This page is where all of them meet: the times you are not looking for one app in particular but the studio's overall thinking, in publication order across the whole catalog. That might mean seeing what changed in the newest release before checking the app it shipped in, noticing how a decision made for one tool echoes in another, or simply catching up on everything at once instead of visiting three separate hubs. If you already know which app brought you here, its own notes page below goes deeper and updates more often than this chronological mix ever will, so treat this page as the map and the app hubs as the destination.
macOS ships no volume mixer: nothing in System Settings can turn one app down on its own. Here is why Core Audio never had one, what Apple changed in macOS 14.2, and the four real ways to get a per app volume mixer on a Mac today, two of them free.
CoolCurve reads Apple silicon fan and sensor hardware through the SMC and lets you set a curve instead of trusting firmware alone. Here is the privileged helper behind it, the four ways your fans return to Apple's control, and the two real gaps in that safety net worth knowing before you buy.
Submix gives every running app its own volume, mute, and live meter through a Core Audio process tap, with no driver and no admin password. Here is the mechanism behind the mixer, what it does not do yet, and who it will not fit.
Preen opens one capture session for a quick camera check before a call, then gets out of the way again. Here is how switching cameras, muting the microphone, and the floating window actually work under the hood, plus two rough edges and who should look elsewhere.
Nine things to check when a MacBook fan runs loud for no visible reason, in the order that actually finds the cause, before anyone tries to sell you an app for it.
Two temperature apps on the same Mac rarely agree, because they read different sensor paths and summarize unlabeled diodes differently. Here is CoolCurve's own pipeline, including what it refuses to guess.
Submix installs no audio driver, kernel extension, or system extension. It asks for one macOS permission, and this is what happens if giving your audio back does not go as planned.
A menu bar app that watches your camera is asking for trust. Here is the single entitlement in Preen's signed release, the literal permission prompt, why the camera light goes off when it does, and why muting your mic in Preen will not move the mute button in your meeting app.
Eight fan and sensor apps for Apple silicon Macs, sorted by what each vendor documents: which set a fan speed, which only read one, and what CoolCurve's own source documents as its own limits.
Camera choice on a Mac is set per app, not once for the whole system. Here is where the picker lives in Zoom, Teams, Meet, Slack and FaceTime, why Continuity Camera takes over silently, and how to confirm the change actually took.
A Multi-Output Device sends the same audio to every output at once. Sending different audio to different destinations, like music to speakers and a call to AirPods, needs a per-app audio tap instead, the API macOS added in version 14.2.