Chorus Dual-Channel Bioacoustic Recorder with GPS

Chorus: The Wildlife Recorder Built for Any Terrain

Engineered for the most demanding fieldwork, with user-replaceable microphones in seconds and class-leading battery life for wildlife monitoring and scientific research.

The Chorus wildlife recorder is designed to survive the toughest field conditions. Its weatherproof, rugged enclosure and low-profile microphones reduce the chance of livestock or wildlife chewing on them. Even if a microphone becomes damaged, it can be replaced by the user in seconds, eliminating the need to return the recorder for servicing. Simply swap the microphone in the field and continue recording.

The included microphone depends on the version selected at purchase. Every Chorus includes an acoustic microphone, making it ready for recording birds, frogs, and other wildlife straight out of the box. The recorder features dual-channel capability, allowing you to add an ultrasonic microphone for bat monitoring or a second acoustic microphone for true stereo recording. No Bluetooth or external devices are required for setup—the integrated OLED display lets you configure and review settings directly on the recorder, providing greater reliability during remote deployments.

Choose from automatic day, night, or continuous recording schedules, or create fully customized recording programs. Monitor bats at night and birds during the day within the same deployment. Chorus can also record bats in zero crossing mode directly on the recorder, significantly reducing storage requirements during long-term monitoring. Complex schedules with multiple recording tasks are easily created using the integrated Toolbox Scheduler in Insight.

Chorus delivers exceptional battery performance, recording up to 50 nights of full-spectrum ultrasonic monitoring or 350 hours of acoustic recording using only four AA batteries. Like all Titley Scientific recorders, Chorus includes integrated GPS as standard. Every recording is automatically geotagged, sunrise and sunset are calculated for automated scheduling, and Transect Mode can be enabled to record GPS tracks during surveys.

Watch our feature overview to see Chorus in action, and our setup tutorial to learn how to configure your recorder.

Key Features

• Weatherproof and impact-resistant IP67 housing built for demanding field conditions.
• User-replaceable low-profile microphones that can be swapped in seconds.
• Dual-channel operation: mono acoustic, stereo acoustic, or acoustic + ultrasonic depending on the selected configuration.
• Standalone setup with no Bluetooth or external devices required, using the integrated OLED display.
• Automatic day, night, or continuous schedules, plus advanced Toolbox scheduling in Insight.
• Zero crossing recording for bats to maximize storage efficiency during long deployments.
• Up to 50 nights of ultrasonic monitoring or 350 hours of acoustic recording using just 4 AA batteries.
• Integrated GPS with automatic geotagging and Transect Mode for route recording.

• Specifications
• In the Box
• Required Items
• Optional Items
• Documents

• 	Mono Acoustic	Stereo Acoustic	Acoustic + Ultrasonic
  Microphone Configuration	1× Acoustic Microphone	2× Acoustic Microphones	1× Acoustic Microphone + 1× Ultrasonic Microphone
  External Dimensions	19.4 × 12.3 × 5.0 cm (7.64 × 4.84 × 1.97 in)
  Weight	0.43 kg (430 g / 15.3 oz), without batteries
  Power Requirements	4 × AA batteries
  Battery Life	Up to 50 nights ultrasonic / 350 hours acoustic with 4 AA batteries*
  Memory	1 × SDHC/SDXC memory card (up to 1 TB)
  Audio Output	Headphone jack with frequency-division playback (ultrasonic) and stereo playback (acoustic)
  Frequency Range	20 Hz to 140 kHz (depending on microphone)
  Housing	Bush green, weatherproof and impact-resistant (IP67), with tripod mount
  GPS	Integrated (daily GPS fixes; Transect Mode records one fix per second)
  File Formats	Full Spectrum (.wav), Zero Crossing (.zc), GPS Track (.gpx), and Temperature Log (.csv)
  Sampling Rates	500, 384, 320, 192, 96, 48, 44.1, 32, 22.05 ksps
  Channels	2 channels. Stereo/mono acoustic or mono ultrasonic. Acoustic and ultrasonic recording are not simultaneous.
  Display	OLED

  *Ultrasonic battery life estimates are based on 10% bat activity at 25°C, with 10-hour recording nights at 320 ksps using four alkaline AA batteries. Acoustic battery life estimates are based on continuous mono recording at 32 ksps using four alkaline AA batteries.

• • 1× Magnetic status lanyard
  • 1× Microphone connector cap
  • 1× Quick Start Guide
  • 1× Microphone (depends on the selected configuration)
• • SDHC/SDXC Memory Card (up to 1 TB)
  • 4× AA Batteries
• • Low-profile Ultrasonic Microphone
  • Additional Low-profile Acoustic Microphone
  • Lockable Security Case
  • Flexible Gooseneck Microphone Extension
• • User Manual (English)