I have the same profile.ps1 in both WindowsPowerShell and PowerShell. It includes commands that invoke Windows Text-To-Speech However, these commands fail when run in PowerShell 7.
The errors occur when I try to use the $PomrptTTS object I create with the following code:
Add-Type -AssemblyName System.speech
$PromptTTS = New-Object System.Speech.Synthesis.SpeechSynthesizer
In PowerShell 7, any attempt to access or use my $PormptTTS object, produces the following:
SetValueInvocationException: ....\profile.ps1:82
Line |
82 | $PromptTTS.Rate = 0 ; $PromptTTS.Speak("Time for the $((Get-Date).DayofWeek) shuffle")
| ~~~~~~~~~~~~~~~~~~~
| Exception setting "Rate": "Object reference not set to an instance of an object."
MethodInvocationException: ....\profile.ps1:82
Line |
82 | … e = 0 ; $PromptTTS.Speak("Time for the $((Get-Date).DayofWeek) shuffle")
| ~~~~~~~~~~~~~~~~~~~~
| Exception calling "Speak" with "1" argument(s): "Object reference not set to an instance of an object."
As of PowerShell 7.0 / .NET Core 3.1, System.Speech.Synthesis.SpeechSynthesizer is considered a .NET Framework-only API and therefore not supported in .NET Core.
The workaround is to use the SAPI.SpVoice COM object (which the .NET Framework API is ultimately based on, I presume):
$sp = New-Object -ComObject SAPI.SpVoice
$sp.Speak("Time for the $((Get-Date).DayOfWeek) shuffle")
A related question asks about changing the speaking voice, which, unfortunately doesn't seem to be supported in PowerShell Core as of PowerShell 7.0, due to limited COM support - see this answer.
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