2-to-1 Audio Signal Multiplexer
A 2-to-1 analog multiplexer can select one signal path from two sources. This example switches between a microphone-level source and a line-level source under control of a select signal. The output then feeds a defined load representing the next stage. The drawing is useful when planning source selection ahead of a preamplifier, recorder or audio processor. In a built circuit, choose an analog switch that suits the signal range, supply voltage and audio performance requirements. Add gain control or buffering where the source impedances and levels require it.
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Scenario
Selecting one of two audio sources.
Key decisions
- Two source inputs: Microphone and line level feed the selector.
- Select control: One signal chooses the active source.
- Loaded output: The output feeds the next audio stage.
When to reuse this
Use this when an audio circuit needs to choose one source path.
Frequently asked questions
Can a multiplexer select audio signals?
Why are microphone and line inputs different?
What does the select signal do?
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