Use the converter node and then hook it up to the freq ratio parameter.
If you also want a semitone detune parameter you can combine those two like this:
HiseSnippet 1767.3oc4YsraaaDEkzxirshaQRSPQ6NtnKbJBLj7qDitvxOjSEZjifoqQ8JiwjCsFHxYXIGZK0hBTf1E8WHqZ+Fxttp4Gn.En+H4OH8N7gDoDsrjpcZBpLfglW7dt2y80P0ziaP784dJpkNpqKQQcQjdWln0tsvTlR88TT+PTCruf3oEM0Nccw99DSEU0BOUNg5BypD940asC1FyLH8mRQ4XN0f7LpCUze1lU+Jps89XSxQTmT6dsp0M3rc417..OEPkUbwFswmSN.K21LHkuD62RQ8yQquxpFqY9XyUVY8M2v.uAYSKrkUkUMWasMdxlUVcS7ZOYCR40UTKVyjJ3d5Brf3qnN6Nbyt5s3WxhDvwTe5Y1D4fJJ5fjildetsoTEkypraKpsYyDCkuhhJpYeyVgHy1CPMnlzdy227c2vEz5ehzFP0YxBuBYfWkzvqbJ3kCjTSAoYifz8P5FdTWQ+Uj34Nn5LfMsv.OkFJQ6UQ8Unc4vFXhkcvsI66AC5cfk1nb4GoA+6gegU.yPP4LMN6.tf7b1ROrz2WZgR+PIsAWxxJ20jhwiaaS7xcYoqg2nN3Rr.myHdOR6Brc.o2FA0OqMEc01zzTtQjVmZibVcFU7bWB6pbDThMUv29556gEXIQDOGrOWhmfJgf5djKfvfHZYAzdD+1BtKDHLDmAdKby.arHqKjLPKdAvFjg2jjCymJ5lNP7FyuZbg38PMoBiV4iwYxAifk51.iwQie.plkEwPzGfyh1+atcB8RK9ERDeTzTXlzPw+owyv3lDsvoI9TehWkQjO8uF27otic9zjf7Gglj.pQlCsxTlCs36b4PeOHbLSZ9ERvnN0w0lTicAwFx4DhwOBRxXgCrEIyl0QqAmwcawYTiz9VGRDdzyOm3kF64pPaKDPk49y7fpGRrIX+TNeeV0mQYDrGXmHSosnxDWxKW95SPQvUSFcn89aZzB+uIM5nLQyip0Q3gqbcEX9Of8hg1JuMg1g7.AkcdCLD51AZ14f.GcHcuAAfEiQrkM.oNirUknwkkikfPmvLCG7F3S7hUjiUiWrRxho5x4.h3RtW6vnu3uCpcTAN+dE3N0OcAtsss4WtK2wkF6RCdMgy0ja2MIIj5LQ6HA1a6vC.IFi89wC6XyMZqS+NRhZ.2H3HL0V9DzC7gd0LeNSGdNgkMUKbLwyOTlygJuL7GDtbPXBo42Ga.DP2lXnBMD2Ia+C3Qh2xF83yqVmRGADc4jqduR4kTCNByfp5HsmxazjTkDZ.Gn+lXO3oAcaKaZbF0BoZhLJembD3IMiDdKhp6erbUCrsxwxZ1xCEJO41iUzhxst.haYYCpmRF099oT6jMLrp0+viVUlF3VnGbKDA24htiBfqKf8BkhxAvPuJK2eCCC3RHeBzfDe.DuPwe9jW9lql.tF7WDEVJKF4kP5hUBSVm187Hr24Dge70.XDiHG9Ppnto7tztN3SCX9fM.DZO5Vt1bnnGsRJm.IJRFAJPCJKV7IoRV5UMvcFbtp5BhaTPR+TN5sIWFYKyTceu9B9HRGwQ7vuuaOqKvEeMyjXAzuox.BRQItIigle6.A2ARsY1yiL1Qbw9LakogZmCY.Dm+XvqSDatHZW3b2r7YITCvzPcs6NYT5I4PomjCkBYoemfRGvFjgT+3djZl8LLudejIQDvHmBavHpt5.b7u9xSxxwlHmX6qFjrUyUxcZVgR2WSvAdqEwSCyL07gpBZTgFGL.vJga2xi7sZdRRVyMgNz3Vgqw8Mf6SEhgrdQSfmwhnTOkL9EKh1WJ6CkOlA7LJLZOCP9C4Y.A1ua4YLZU30+w+dUHUf0DqEudq70B3JMWkVL+siVfPaaZdSRCYbkTRUMMiq3Ps83QVN0xCGYl4zYCI6LXH4HJmJ2DbI0NIukr8n9t13t6D.WvHJqXlYjYoASPmjdPq4bFwDdvgGOouzLwNESQYkFuXm6NgEJiqYb8bVS74QuuZ8fydpGOvMbvX5JllIyUUVq5Ppxu72CpJ+1KdwuOrpT8mb9ysh5vRlDJ.ZSt6Mj97isqlq9.ymVetSNQSaML0TdBolLIUukInQjqnzzmzdzNdOEj1sudcMD0MS8mlsjumnaHcY7pJU3FhiFkhUL7sB91jiBujWZEKJvVO9tO9JS90EBema4ph05.xfgsS8pofBwPNa7YxN5xf1wvHTOZ1PxYHxHcKUWcGVouj30bQpXaSwvt7Ul7Vteexrj4FV4aW1gya6fCeMNS2ua0aiW5jC1vieZ70Gjp67gy.jAK9sRzPNVqhxECZnbnlzSMLx9nF5fqLsGb0o8fqMsGb8o8faLsG7wS6Aex0eP4ukSb1YoqKj7sYsn95Tqwhhajor+G.Rsebr