Selectable delay for phase interactions between loaded IRs.Automatic high-quality resampling for IRs with different sampling rates.Libra is meant to be used as a cabinet simulator for live playing and jamming, tracking or mixing inside hosts capable of AAX/AU/VST/VST3 Plug-Ins support. Its unique Cartesian Mixer allows the user to mix up to 8 different IRs in a graphical way, keeping the output level consistent and allowing to perfectly balance different cabs and mics.Īdditionally, you can export the equivalent IR to use it in your favourite device. It has been designed to perform pristine quality convolution in real time, while being light on the CPU and easy to use, providing advanced built-in filters and delay controls to let guitarists and bassists shape their tone with ease, without the need to be professional audio engineers. Due to this biasing current, 2N3904 goes to the saturation state and the LED turns ON.Libra is a zero latency, 8 channel Impulse Response (IR) convolver, designed to be used as a cabinet simulator for guitar and bass (pre)amplifiers (AAX/AU/VST/VST3 or even hardware).

When the switch is closed, the base of the transistor is biased, and current flows to the base of the transistor. Due to this, 2N3904 remains in the cut-off state and the LED does not glow. And no current flows to the base of the transistor. When the switch is open, the base of the transistor is not biased. The required resistor value can be easily calculated using Ohm’s law. Proper biasing of the base ensures adequate base current to turn ON the transistor.Ī resistor of 220 Ohm is connected between the load(LED) and the collector terminal to protect the LED from overcurrent. The base of the transistor is biased using a 10 K Ohm resistor(R3) in parallel to the 1 K Ohm resistor(R2) plus base-emitter junction resistance(in series). The complete circuit is powered via a 5 V supply. In the circuit diagram given above, 2N3904 is used as a switch to turn ON/OFF an LED connected at the collector terminal.

Free download 2n3904