The speech voice my new Mac speaks is different from my old one I purchased M1 MacBook Air but it speaks different voice from my old Mac (2017 MacBook). I thought the voice is set at System Preferences | Accessibility | Spoken Content, but both of my Mac are set to Ting-Ting.
However, the voices my Macs speak are different between devices, and I don't like the way my M1 Mac speaks.
I play the speech either on Memrise or Anki, where I use the third-party speech tools:

https://github.com/cooljingle/memrise-audio-provider
https://github.com/AwesomeTTS/awesometts-anki-addon (where I use 'OS X Speech Synthesis)

Ting-Ting is a Chinese female voice but I play the speech on Korean and English as well as Chinese, and all of them seem to be different.
Is there something I'm missing? Why are these different and how can I make them speak in the same voice?
Both Mac is run on the latest version of Big Sur.

UPDATE
I have found that the setting on System Preferences | Accessibility | Spoken Content does not have any effect on the voice of the aforementioned tools. I tried several different speaker such as French male but the voice did not change.
In System Preferences &gt; Accessibility, click on Speech (in the left-hand sidebar). Then open the System Voice menu and select Customize. Here, verify if the selected voices have downloaded to your system:

(Screenshot from macOS Mojave).
Note also the &quot;Upgrade to enhanced quality&quot; option, next to already downloaded voices.