[Windows] SpeechSynthesizer outputs to SAPI audio device instead of Windows default device

[cdavy2016-hash]

Description

On Windows, announce.ps1 creates a System.Speech.Synthesis.SpeechSynthesizer instance without calling SetOutputToDefaultAudioDevice(). As a result, the synthesizer outputs to the audio device configured in Windows SAPI settings (Control Panel > Speech), which may differ from the user's default Windows audio device.

Observed behavior

Users who have a wireless headset set as the Windows default playback device receive announcements through the built-in speakers instead. Other Windows applications and NVDA correctly use the default device (the headset), but Claude Code announcements do not.

Root cause

announce.ps1:

$synth = New-Object System.Speech.Synthesis.SpeechSynthesizer
$synth.Speak($message)

System.Speech.Synthesis.SpeechSynthesizer defaults to the SAPI-configured audio output token, which is stored separately from the Windows audio default and may point to a different device.

Expected behavior

Announcements should follow the Windows default audio output device, consistently with other applications.

Fix

Add a single call before Speak():

$synth = New-Object System.Speech.Synthesis.SpeechSynthesizer
$synth.SetOutputToDefaultAudioDevice()
$synth.Speak($message)

SetOutputToDefaultAudioDevice() routes audio through the Windows WAVE_MAPPER, which always resolves to the current default playback device.