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Little Bird Electronics

Setup tool

Motion activated audio player setup

Work out which trigger mode you need, build a valid Config.txt, and load your sounds onto the player in the order it actually indexes them.

Your audio never leaves this computer. Files are read from your disk and written to your player inside the browser. There is no upload, no server copy and no account — and there is no endpoint to upload to even if we wanted one. On top of that, the page is served with a security policy that blocks it from sending data anywhere: the only things it may load are its own stylesheet, its own script and our logo.

Which player do you have?

1 Choose a trigger mode

The mode is a single number in the config file. It decides what the player does when a sensor sees motion, and how your files have to be laid out.

When a sensor sees motion, should the player…
If motion is detected again while a sound is still playing…

A PIR re-arms about 3 seconds after it triggers, so anybody still moving in front of it will fire it again part-way through a longer sound. That is exactly why Flyron recommends the “let it finish” modes with a PIR — on the other setting, a 20 second announcement can restart forever and never get past its first sentence.

Show all eight trigger modes and the K1–K7 terminals

These players are built on Flyron’s triggerable MP3 board, which has seven trigger inputs, K1 to K7, and the eight modes below. Everything on this page follows the FN-AL7T manual. In your bundle, The remaining terminals are wired at the factory and shouldn’t be altered — if you want to drive them yourself, talk to us first.

Mode What it does File layout

2 Build the config file

Config.txt is a plain text file holding one number and nothing else. Hand-made ones fail more often than they work: TextEdit saves .rtf by default, Notepad can add a byte-order mark, and both like to append a newline. This writes the exact bytes.

Config.txt — the whole file

2

3 Load your sounds onto the player

The player indexes files by the order they were written to it, not by their names. Dragging a folder across in Finder or Explorer copies them in whatever order it likes, which is why sounds come out attached to the wrong sensor. This writes them one at a time, in order, and checks the result.

The rules this tool follows

Straight from the Flyron FN-AL7T manual, in case you’d rather do it by hand.

The config file

  • 1 digit — the trigger mode on its own, e.g. 2.
  • 3 digits — mode plus a two-digit volume, 00 to 30, e.g. 220 is mode 2 at volume 20.
  • 5 digits — mode, volume, then a two-digit RS485 address, e.g. 22002.
  • There is no valid 2 or 4 digit form. With no config file at all the player runs mode 0.
  • Save it as plain text named Config.txt in the root of the drive.

Where the files go

  • Modes 0–2 — all files in the root. The first file written answers K1 (Sensor 1), the second K2, and so on.
  • Mode 3 — all files in the root as one playlist, again by write order. The inputs are transport controls in this mode (K1 next, K2 previous, K3 play/pause, K4 stop, K5 volume up, K6 volume down, K7 random), not a sound each — and it’s the one mode that holds more than seven files.
  • Mode 4 — all files in the root, indexed by name: 000.mp3 loops in the background, 001.mp3–007.mp3 answer K1–K7.
  • Modes 5–7 — folders 01 to 07, one per input. Inside each folder, files are again indexed by write order.
  • You can keep the original title after the number: 001-Never Say Goodbye.mp3 is fine in every mode.

Wiring a PIR

  • Supply the player 12–24 V DC when a PIR is attached — the sensor runs off the board and won’t take more.
  • Sensor red and black go to VCC and GND; the yellow signal wire goes to K1 (and the second sensor’s to K2).
  • Flyron recommends mode 2 for one sound per sensor, or mode 6 for several.
  • The sensor re-arms about 3 seconds after it triggers, so someone still moving in front of it will fire it again — which is why the “plays to the end” modes suit a PIR.

Green terminal block means the negative-trigger version of the board, orange means positive trigger. Check which one you have before wiring anything other than the supplied sensors.

The players this sets up