Here’s how I send tones with ssml:
[{"id":"abbbc8e05990087a","type":"inject","z":"e982ec38.fd46","name":"","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"I've fallen down and I can't get up","payloadType":"str","x":130,"y":1840,"wires":[["0898cbd6e21d310c"]]},{"id":"0898cbd6e21d310c","type":"template","z":"e982ec38.fd46","name":"Bleep Five","field":"payload","fieldType":"msg","format":"handlebars","syntax":"mustache","template":"<speak>\n<prosody pitch=\"high\">\n<say-as interpret-as=\"expletive\">\"Text\"</say-as>\n</prosody>\n\n<break time=\"250ms\"/>\n<prosody pitch=\"high\">\n<say-as interpret-as=\"expletive\">\"Text\"</say-as>\n</prosody>\n\n<break time=\"250ms\"/>\n<prosody pitch=\"high\">\n<say-as interpret-as=\"expletive\">\"Text\"</say-as>\n</prosody>\n\n<break time=\"250ms\"/>\n<prosody pitch=\"high\">\n<say-as interpret-as=\"expletive\">\"Text\"</say-as>\n</prosody>\n\n<break time=\"250ms\"/>\n<prosody pitch=\"high\">\n<say-as interpret-as=\"expletive\">\"Text\"</say-as>\n</prosody>\n</speak>\n","output":"str","x":290,"y":1840,"wires":[["6b190323031f9880"]]},{"id":"6b190323031f9880","type":"alexa-remote-routine","z":"e982ec38.fd46","name":"Alexa SSML to Stephen","account":"4627f780.84a6a8","routineNode":{"type":"speak","payload":{"type":"ssml","text":{"type":"msg","value":"payload"},"devices":["G0911B0592850CN1"]}},"x":510,"y":1840,"wires":[[]]},{"id":"4627f780.84a6a8","type":"alexa-remote-account","name":"","authMethod":"proxy","proxyOwnIp":"192.168.1.57","proxyPort":"3456","cookieFile":"alexa.txt","refreshInterval":"1","alexaServiceHost":"pitangui.amazon.com","amazonPage":"amazon.com","acceptLanguage":"en-US","userAgent":"","useWsMqtt":"on","autoInit":"off"}]