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SyrinxPC Bioacoustic analysis

Version 2.4o
Windows 98 / 2000 / XP

Developed by John Burt Psychology Department, University of Washington Version 2.4o · 8 February 2005
Specimen 01Syrinx display
Syrinx display window with spectrograms of two neighboring song sparrows
Four playable spectrogram rows above a real time scrolling field recording. Select the image to open the full display note.

Sound analysis for field and laboratory research

A Windows program for spectral analysis, editing, and playback of acoustic signals.

Syrinx was made for the practical work of animal acoustic communication: recording birdsong in the field, monitoring vocal animals in the lab, measuring spectrograms, and running playback experiments. It runs on Windows 98, 2000, and XP.

Current version
2.4o
Released
8 February 2005
Platform
Windows 98, 2000, XP
Author
John Burt, University of Washington

What Syrinx does

Four kinds of work, one instrument.

The program grew out of field playback and direct to disk recording, then added the analysis tools that researchers kept asking for.

01

Field recording

Sounds are recorded directly to disk on a sound card equipped computer with a microphone. A scrolling spectrogram shows the incoming sound while it is captured, and a single key press stores the most recent audio buffer to a wave file. This makes it possible to collect a bird repertoire quickly in the field for later playback and analysis.

02

Lab recording

Run on a modest PC, Syrinx works as an automatic sound detector for long laboratory sessions. Sound events are stored as a numbered series of wave files, with an optional time and date stamp for unique file names. Recordings that would fill hundreds of hours of tape can be reduced to the songs and calls that matter.

03

Sound analysis

Sounds are analyzed as spectrograms. Several displays can be opened at once, saved for later recall, printed on a black and white printer, or copied into drawing programs as illustrations. Time and frequency cursors take measurements directly from the display and write them to text logs. Long recordings and multichannel files from microphone arrays can also be browsed.

04

Field playback

Syrinx brings recording, display, and playback together for interactive experiments. A notebook computer, microphone, and speaker are enough. Spectrograms of playback songs, recorded songs, and the song of the subject can be compared at a glance, and the next stimulus can be chosen and delivered without leaving the display. A simple behavior entry feature maps keys to events, then writes a trial log with start and end times.

Example display

See a field tape as a working score.

Spectrograms of two neighboring song sparrows in the Syrinx display window
Partial repertoires of two neighboring song sparrows. The upper four rows are instantly playable. The lower panel is a real time scrolling display of a field tape, and microphone input looks the same.

The upper four rows hold short, instantly playable spectrograms. The longer panel at the bottom is a real time scrolling display of a field tape, and microphone input looks the same. Windows can be resized, recorded into, printed, and saved as a display for quick recall.

Each sound can be edited, filtered with the sound tools, saved, played, or measured with the time and frequency cursors. The same display is used for live recording, playback, and the analysis of stored recordings.

Read the display note

Release ledger

Version history, kept in the open.

The current release is 2.4o. There is no Beta version.

Version 2.4o

8 February 2005

Bugs fixed

  • Fixed a problem loading default recording settings.
  • Fixed several bugs in creating and using annotation links.
  • Clicking an annotation inside another now selects it more reliably.
  • Fixed a bug that deselected the current annotation when it was edited.
  • Fixed a malformed display file bug.
  • Recording storage now updates the scroll bar correctly.
  • Deleting an annotation comment now clears it.
  • Annotations now work when known file type extensions are hidden.

Features added

  • Input device selector in the recording settings dialog.
  • Stereo recording, with one channel shown in the scrolling display.
  • Enter opens the annotation editor when an annotation is selected.
  • Save an annotation to a sound clip through the klipnsave interface.
  • Delete removes the current annotation.
  • Ctrl with the left or right arrow selects the next or previous annotation in a channel.
  • Ctrl with the up or down arrow selects the channel.
  • Loop mode playback settings button in the playback settings dialog.

Version 2.4i

1 January 2005
Earlier release notes
  • Works with Windows XP, 2000, 98, and ME.
  • Persistent on screen annotation of series files through a special linked log file.
  • Improvements to the sound detector.
  • Faster loading of large recordings and series files.
  • Fixed a perpetual window redraw bug.
  • When store buffer when filled is checked in recording settings, Syrinx stores sequential chunks of sound seamlessly without losing samples.
  • Automatic creation of more than the outer folder in a path.
  • Multirow splitter windows now distribute themselves properly.
  • Rewritten and debugged sound file management code.
  • Save all windows added to the file menu for quick saving of several editing sessions.
  • New help topic: Getting started with Syrinx.

The previous version was 2.4i, dated 1 January 2005.

Syrinx is free. A short request is all it takes.

Send the information on the request page and put Syrinx request in the subject line. You will receive a link to the download by email.

Request Syrinx