Standalone mode: IC705 TX audio is silent arriving to the radio

[adecarolis]

the IC705 sends no audio while being used in standalone mode. This happens in FT8 as well as USB

Console output:

(index):9299 [DIGI] ft8ts library ready
cw-decoder.js?v=d4f10c7167d35b986b87ef5a7d2b358442f9b7a7:104 [CW Decoder] Initializing...
cw-decoder.js?v=d4f10c7167d35b986b87ef5a7d2b358442f9b7a7:208 [CW Decoder] UI created
js8-panel.mjs?v=d4f10c7167d35b986b87ef5a7d2b358442f9b7a7:2894 [JS8] messenger panel ready
(index):9533 standalone connect failed: DOMException: Failed to execute 'requestPort' on 'Serial': No port selected by the user.
(anonymous) @ (index):9533
2serial-transport.js?v=d4f10c7167d35b986b87ef5a7d2b358442f9b7a7:1466 [CIV] rig NACK (0xFA)
_onFrame @ serial-transport.js?v=d4f10c7167d35b986b87ef5a7d2b358442f9b7a7:1466
serial-transport.js?v=d4f10c7167d35b986b87ef5a7d2b358442f9b7a7:2000 SerialRigTransport: using RX audio device: USB Audio CODEC  (08bb:2901)
2serial-transport.js?v=d4f10c7167d35b986b87ef5a7d2b358442f9b7a7:1466 [CIV] rig NACK (0xFA)
_onFrame @ serial-transport.js?v=d4f10c7167d35b986b87ef5a7d2b358442f9b7a7:1466
cw-decoder.js?v=d4f10c7167d35b986b87ef5a7d2b358442f9b7a7:341 [CW Decoder] Using AudioWorklet processor