If using a Linux host you can pass audio into a Windows VirtualBox VM for Windows only software data modes. The “SET” button allows for resume times etc. Scan function “ΔF (Delta Frequency)” can do + or - 1 MHz max freq sweep. Instead switch “DATA OFF MOD” as required from “MIC,ACC” to “USB”. Probably don’t bother with using the “DATA” mode as its too narrow AF output for SSTV etc. So you can switch “ACC/USB Output Select” to IF and AF output depending if you need raw IQ or standard speaker audio into your software. “DATA” mode seems to allow audio input via USB instead of using the microphone it also seems to change the RX bandwidth to a very small 1.2k or 500 and remove DSP. “ACC” is the accessory socket aka DIN socket. This is to allow USB audio to always be present regardless of SQL level. “SET”/”Connectors”/”USB Audio SQL”: “OFF (OPEN)” This is to choose USB source as the microphone when operating in “DATA” mode. This is to choose fist microphone when not operating in “DATA” mode e.g. “SET”/”Connectors”/”DATA OFF MOD”: “MIC,ACC” “IF” (Intermediate Frequency) is basically raw IQ. “AF” is basically normal speaker audio without much/any DSP.

“SET”/”Connectors”/”ACC/USB Output Select”: “AF” for data modes direct and “IF” for anything via GQRX. Using IC-7100 for data modes on a PC Connector settings explained