Lite2Sound QB is a portable audio device for receiving modulated light. It is made
specially for creative audio enthusiasts, sound designers, music producers, and
performing artists. Imagine accessing ambient music that is previously unheard,
yet full of accidental beauty and strange textures.
With Lite2Sound you’ll uncover hidden sources of audio frequencies that are all
around us waiting to be discovered. That's because the technology behind modern
high-tech light sources is often ickering at frequencies too fast for our eyes to see,
yet within our hearing range - if we only had a way to listen. That's what Lite2Sound
does. It reveals these invisible tones to your ears and lets you blend the frequencies
into chords as you move it through space and aim it like a camera.
The wooden case design is inspired by vintage radio receiver sets. It offers a classic
yet low-key appearance that won’t arouse distracting attention when used for field
recordings. Its built-in speaker and battery means no hassles from plugs and
cables.
What is Lite2Sound QB?
Audio connections
The 3.5mm jack is a mic-level audio output that can be connected to the stereo mic
input of a camcorder or portable audio recorder. This is a direct output (pre-
limiter). Use a shielded audio cable for best sound quality.
The 1/4” jack is a line level output, and is post-limiter. Plugging into this jack will
mute the internal speaker. Connect it to any audio device with a 1/4” line input.
You can also plug in headphones, but note that audio will only be heard on one
side of the headphones.
A standard camera tripod mount is built in to the base. Mounting it on a tripod
makes it easy to position and focus on interesting sources.
Tripod mount
Suggested listening
Begin by exploring around the home. Try video screens, displays, digital toys, etc.
Public spaces that are saturated with technology provide many interesting
sounds: arcades, midways, toy stores, video showrooms, casinos, LED light art
installations, etc.
Night time driving in the city gives an ever changing soundscape with surprises.
For best sound quality, use it at night and aim it away from background lighting.
Sunlight increases the noise oor. AC grid-powered light bulbs add mains hum
harmonics.
Lite2Sound QB contains several refinements that distinguish it from the previous
versions we have offered. Like the PX model, QB has automatic exposure control
so it can work well in either bright or dim light conditions, without changing any
settings. The QB also includes an audio limiter for smoother sound quality and
low distortion.
The QB has a built in copper foil shield to prevent electromagnetic interference
from contaminating the audio.
Additionally, the QB has a direct audio output for connecting to the mic input jack
of video recorders. This output bypasses the power amplifier and AGC limiter
circuitry, allowing the best dynamic range and lowest noise oor.
What’s new in this version?
Use the internal 9V battery, or connect an AC adapter to the power input jack. This
unit requires a 9 VDC regulated power source with tip positive polarity. It is
protected against reverse polarity and over-voltage.
Power supply
Lite2Sound QB Photodiode Ampilfier | User Guide 1.0
Rare Waves LLC USA
rarewaves.net
A u t o G a i n P h o t o d i o d e A m p l i f i e r
