@WillDevelop I have tested that and can not get it to work, as soon as I trigger the same note on event as the active note, it will kill the first active note.
It seems to be an inbuilt safety function in Hise (only guessing here)
I have not tested it using sendToMidiOut(), maybe that will work, I guess it depends on how the "receiving" daw, plugin, handles it.
Inside Hise I can get it to work using the Synth.addPitchFade(), but that will not be applied to what
Message.sendToMidiOut();
sends out, it will still send the actual pressed key
this is an example using the pitch fade function
HiseSnippet 1445.3oc6X80aSbDD+NmbsXCEAUzpp9zJTExQJ0xWZHlTZKNI1lZQLwM1D5KUnM2M1dEm285c6EvBgDpeAZ+H0OB8iBuzmSmcuy9tKwABVfZKB+PT1Ym+761cleybW2.gCDFJBLLK1ehOXXdIqdS3xQ6Lhx3FsaXXdYqNzPIDPhEs8DeZXH3ZXZtzcUBLKtrg92Kuy1TOJ2AREYXbff4.6xFyjoR6V+dLOuVTWnOabFsWudaGAeGgmHBwyRVUM7oNOlNDtOUoVAKCyOpoKSJB5IoRHzvb4sEtS5MR7Ddr9GvBYG5ApE1F8PGEKtkvyUgXkTicFw7b6N84Nzvvzpa5ovRwmBWypCykMSd5owUzaPRsH64gYg7vaobvyNK7plAdyARlYfzxwP5pV8bBX9xzcT34hVs43ky.JdrmEJw5ZT32KXsi.0fKqLl9XnU.tXlEk2nZ0UI3eV41kJE.CIiwmscYgRx2SZxGx3PEm..eV5jHurRwRCh3NRlfSD76Kjvd7xqT5YkJ1AQEdYUgMjKBflGgwrrLHBPaJVpnmvg5Q3nmmp2PPpL+9QiODBJGq0T.TIDjGP8hfx7UI5DxJTW2jnYuJAklwMG.n2YxIkWYUR0Uh8Da.oLm7CjatI4F2.i62Qps1JkJh3r3L+0kIcFoxCKOKtCmEWkuTGNeMW4TzmOOqaWu1T2tQ0Evs2rVF297RjSdjNXv44LMNh7XCZ.dzIf61SzZ01cNA+LN4WIFI4ggJqIP34oTPgjSrspxc96jXXYt16qRNRE5YJhoy4qQrN6ZjrkvNwIwYTTvayYx87A9YUXajj4i+2CZ2fJopBqDYnd9PfjoffYC3HjkJtLqnUCH7wRguV2w9BtxClWRlvKDWX0xSPkL9v9LDpLrhqj08fIGJnAtFOMK+2jYK9iWT+ILW4nYB9yeq9HfMbTJy3K9o5IvKFKYb5gCmxKV7ibccOVoNSBiSkd7wG+k4ktVhXsxR3oxTkmBO8oRgewz5YkHjqiQ6gJHd8ukXudkpqpj0fE5iIV64HoGkjwfaOf5EB582U7DzLTzl5k+HKdk8Z0zq2IJTJFe2.p+HlSXNKa.CnQdxs78AZfpuAtqJ2Vu41dH0O5p8wiYAtQ0Jaro92stU0ZaVslsVq9hgC8fNBWHmmUzUHkMmCdJnnk8fP3.vAS7xfkYQC2rkGU1SNw6DdpayoWAmTNl.GHSixZSk2j6lI1aT54XCuSQlisQDtQXHy2aQ0PMYCrXJGgthzlGhjbYa39Vqgy4EhW0RStMeLVXNXDK4dWfwj1zehUyACva0T.trUqe9cSO4rg+BmwrRWR2rEWAA1uMlTx+bOoj4ReXxn7SFUTim8hjyatHy+1h7ZFiID3t8EI9POdBd2FJ7fJ9ALrM7Y0L81mm94mx4en4a9luefy78MNyKGG9KZ0CoG07l5f+450jGhSWPtKfDmpCuWE44e81m7Ld3l93PHg9hvbNtGLl0GmALLqP03BAvupmMIq7cv4Dl6Vu7NsvGx4ZSOpLJPmVr0XQDWlKM3URpaufj5K+eNR8+GTraVn6o9TIWAScG66AM4Ggu.JJQgwO0JYt1oRymK2QvE9iDblS1K58AY.a3PHHK1m6CzVRINXbpjqUeevCnYSZ+p56hIaz.0XwK3Yg8abO34de8EVwvknJ.I+qSR+wSeqpoeu.MH+rYKIydDre8HD4.5S0PH8ZrMdkGHUFkJqA3vND7xeY7Fwva+tuKzRue2EZeQj5k06PwpL7sysvY05gj+NPxKpolDxrfh.OdcU05X1etqdg5snS1zVs1LYS6oa9dSLFScBDOxIdNRUw9EzRvyVt9qvhiUqVSrMzyVlMeQ8AmdjiSdWcJCWaQM7aVTCWeQM7lKpgarnFVaQM7VudCUcx2JRJFGW9aXzoaS8f4llM4JpLcUmw+nyWg9B
and this is an example without the pitch fade function
HiseSnippet 1425.3oc6X0saSbDEdWmrTrgVAUzppd0HTExQJxxaZHlTZKNI1lZQLwM1D5MUnI6dr8HVOy1cGGvBgDpOA8QpOB8Qga50omY1c8tahCIXApsH7EQ472b9lYN+Ma2.gCDFJBLLK1epOXXdUqdS4xQ6Lhx3FsaXX9YVcngRHfDwZ6o9zvPv0vzbo6qXXVbYC8uWeusodTtCjxxv3.AyA1kMlIS41s9CXddsntPe13LZud81NB9NBOwDDOKYU0vm57T5P3gTkZErLLuTSWlTDzSRkPng4xaKbm1aj3Y7H8OfExNzCTD1F8vEJhcKgmqBwJtF6Lh441MYeGZXXZ0M8TXonSgaX0g4xlwO8z3ZZAjTKxddXVHO7VJG7ryBupYf2bfjYFHsbDjttUOm.luLUhBOWwpMGubFPwi8rPIRWiBrBV6HPM3xJioOEZEfDyrn7FUqtJA+yJ2sTo.XHYLt21kEJI+.oIeHiCUbB.buzIleYkhkFLg6HYBNQvenPB6wKuRoWTpXGDU3kUE1PtH.ZdD5yxxfI.ZSwRE8DNTOBGW4D8FBRk4Obx3CgfxQZwFPJyI+H41aRt0sPs+dRs0VoTQb0KlfsJgf7.p2DnLeUhNVsB00MFH1psypYcwA.5YlbZ4UVkTcEkWdYVGsdsDGsQ02RGc6ZmqidYIxIOrFL3hbZE4NdjAM.O5Tvc6oZsZ6VdFBGlfvy3LUCk6dBXnhGBDddJETH4DhU4jyWRrgk45UeUxQJWOSQLPMezu0YG8mM4zIJ7LihBdaNStmOvOqTVi3XZ7+dT6FTIUkxDyC0yGBjLEDLa.Gg0ehRfJZ0.BepT3q0crufqVAyqJiy3iRYZ4InRFeXeFBUFlKUx5AvzCEz.Wimmsx1zYD+wqp+LlqbzLF+4uWeDvFNJsl2q945wvKBKYVzCGlTwq3kbccOVoNSBiS4d7wG+044tVLasxR34xTkSfm9TovuZZ8hRDxMQu8XEDu42QrWuR0UU7ZvB8w.q8bjzihiXPwCndgfV9thmglgr1TS9SrHJ60poo2YRnTL99AT+QLmvbV1.FPm3I2x2GnApNBnTUrsV31dXQcbo1GOlEnfpU1XS8u6bmp01rZMasV8ECG5AcDtPtUVUHBKFy4fmBJZdOJDN.bv.uLXYl2Pgs7nxdxodmXk51L4J3j7w.3.YpWVKgeStaFeuQoWhsxNUYZrAgvcB5x7cMTsJiEfIS4JUqJGyCwJGYak9NqUxEEhW2pKS5LZ9XrvbvHlx89.iwMf+TqlCFf2po.bYqV+x6mtsYc+kOioftptMJRAA1uKlAx+BOCj4Reblm7y7TTim8lHm2DOl+sE4bFPID3t8EwqgdvC7tMT3AU7CXXa3ypY5cuH8yO0h+wlu4a99wZlenUy7yhb+Ur5gkG00M0N+K0zjGiSWPtOfENUGduohm+069hmQC2zGGBIzWDlag6AiY8wY.CyxTMtP.7a5YSxxeGbNg4J502qEtImqM8nxIA5vhsFKlvk4BCdiE0sWvh5K+eth5+OHY2rP2S8QPtFF5N12CZxOBeUGxQgwO2Jdt1Dt4ik6H3B+QBNyI6E89fLfMbHDjE6ycCskThCFmx4F02G7.Z1f1uo9tXvFMPMV7BdVX+V2Cdt2WekUDbIpDPx+5Eo+jjWUk7HbMH+hYjjYaA6yGgXMf9TMDRuFaiW4ARkQo7Z.NrCAu7WFuUU3se+2EZoOr6BsuXh5w5cnXVF95bKbVsdXweGH9gZpIgLKnJfGQWUQGU8m6pITuhNVnsh1LVnchvOX7wXpSf3INQyQpR1urlCd1x0eeUbrZEMw1POaY13E0Gb5INN4WpSY3ZKpge6hZ35Kpg2dQMbiE0vZKpg247MT0IeqIRw3nzeCiNcapGL2zrIWUJSm0Y7O.L9XIR