Transmission Sources - Revision history

Clanker: Simplify user guides and use the cleaned transmitter illustration

2026-09-13T22:13:14Z

Simplify user guides and use the cleaned transmitter illustration

← Older revision		Revision as of 22:13, 13 September 2026
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	! Source !! Description		! Source !! Description
	\|-		\|-
	\| Audio File \|\| Plays a local file or an HTTP or HTTPS audio stream. Supported local formats are wav, mp3, aiff, aif, and au. Files ~~are resampled to 48 kHz and~~ may be selected with '''Choose...''' or dragged onto the window. '''URL...''' selects a stream, and '''Repeat''' restarts a local file when it ends.		\| Audio File \|\| Plays a local file or an HTTP or HTTPS audio stream. Supported local formats are wav, mp3, aiff, aif, and au. Files may be selected with '''Choose...''' or dragged onto the window. '''URL...''' selects a stream, and '''Repeat''' restarts a local file when it ends.
	\|-		\|-
	\| Microphone \|\| Transmits live audio from a selected input device. The device list appears when this source is chosen. Availability depends on the operating system audio setup.		\| Microphone \|\| Transmits live audio from a selected input device. The device list appears when this source is chosen. Availability depends on the operating system audio setup.

Clanker: Rework documentation for new users: illustrated steps, clear navigation, preserved technical references, and current 0.3.6 behavior

2026-09-13T21:22:08Z

Rework documentation for new users: illustrated steps, clear navigation, preserved technical references, and current 0.3.6 behavior

← Older revision		Revision as of 21:22, 13 September 2026
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			{{Documentation navigation}}

	The transmission source determines what audio or signal the transmitter sends. It is selected in the '''Transmission Source''' section of the [[Transmitter Interface]].		The transmission source determines what audio or signal the transmitter sends. It is selected in the '''Transmission Source''' section of the [[Transmitter Interface]].


			== Choose the simplest source for the task ==
			* '''Play a recording:''' select Audio File, press Choose..., and pick a WAV or MP3. Leave Repeat off for a one-time transmission.
			* '''Speak live:''' select Microphone, choose the input device, and check the monitor with a short transmission.
			* '''Relay a stream:''' select Audio File and press URL.... Supply a direct supported HTTP or HTTPS audio stream, not a page containing an audio player.
			* '''Send desktop audio on Linux:''' choose an available PipeWire source. Stereo selects WFM automatically.
			* '''Use a signal from another program:''' see GNU Radio IQ below. This needs matching sample-rate and connection settings.

			Start with Audio Gain 0.9 and listen to the result. If it distorts, lower the gain before increasing transmitter power. '''Tone (Hz)''' is not an extra source selector; a greyed-out field is not needed by the current source.

	== Source types ==		== Source types ==

Clanker: Add and update user documentation for Lua extensions and the catalog

2026-08-06T09:12:30Z

Add and update user documentation for Lua extensions and the catalog

← Older revision		Revision as of 09:12, 6 August 2026
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	! Source !! Description		! Source !! Description
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	\| Audio File \|\| Plays an audio ~~file~~. Supported formats: wav, mp3, aiff, aif, au. Files are resampled to 48 kHz~~. Files can~~ be selected with '''Choose...''' or dragged onto the window.		\| Audio File \|\| Plays a local file or an HTTP or HTTPS audio stream. Supported local formats are wav, mp3, aiff, aif, and au. Files are resampled to 48 kHz and may be selected with '''Choose...''' or dragged onto the window. '''URL...''' selects a stream, and '''Repeat''' restarts a local file when it ends.
	\|-		\|-
	\| Microphone \|\| Transmits live audio from a selected input device. The device list appears when this source is chosen. Availability depends on the operating system audio setup.		\| Microphone \|\| Transmits live audio from a selected input device. The device list appears when this source is chosen. Availability depends on the operating system audio setup.
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	\| GNU Radio IQ \|\| Receives complex IQ samples from GNU Radio over a local TCP connection. The Tone field becomes '''IQ Port''' (suggested port 7355). Point a GNU Radio TCP sink at 127.0.0.1 on that port. The source sample rate equals the requested bandwidth. Selecting it forces the IQ mode.		\| GNU Radio IQ \|\| Receives complex IQ samples from GNU Radio over a local TCP connection. The Tone field becomes '''IQ Port''' (suggested port 7355). Point a GNU Radio TCP sink at 127.0.0.1 on that port. The source sample rate equals the requested bandwidth. Selecting it forces the IQ mode.
	\|}		\|}

			== Lua modulation inputs ==
			An installed [[Lua extensions\|Lua modulation]] may use the ordinary audio sources, require no audio source, or add pickers for images, videos, and data files. A source-free mode disables the Source Type field and controls its own output timing. Required extension inputs must be selected before transmission can start.

	== Audio gain ==		== Audio gain ==

Clanker: Create transmission sources page

2026-07-05T08:43:07Z

Create transmission sources page

New page

The transmission source determines what audio or signal the transmitter sends. It is selected in the '''Transmission Source''' section of the [[Transmitter Interface]].

== Source types ==
{| class="wikitable"
! Source !! Description
|-
| Audio File || Plays an audio file. Supported formats: wav, mp3, aiff, aif, au. Files are resampled to 48 kHz. Files can be selected with '''Choose...''' or dragged onto the window.
|-
| Microphone || Transmits live audio from a selected input device. The device list appears when this source is chosen. Availability depends on the operating system audio setup.
|-
| White Noise || Generates broadband noise. Useful for testing receivers and observing the occupied bandwidth.
|-
| PipeWire || Streams the system audio (mono) on Linux systems with PipeWire. Only shown when PipeWire is available.
|-
| PipeWire Stereo || Streams system audio in stereo, intended for WFM broadcasting. Selecting it forces the WFM mode. Only shown when PipeWire is available.
|-
| GNU Radio IQ || Receives complex IQ samples from GNU Radio over a local TCP connection. The Tone field becomes '''IQ Port''' (suggested port 7355). Point a GNU Radio TCP sink at 127.0.0.1 on that port. The source sample rate equals the requested bandwidth. Selecting it forces the IQ mode.
|}

== Audio gain ==
The '''Audio Gain''' field (default 0.9) scales the source level before modulation. Driving it high increases loudness but pushes the transmitter into compression and distortion, especially with presets that have little headroom, see [[Radio Presets]].

[[Category:SimTX]]