SDRAngel not transmitting voice through HackRF One

[DerrickLau]

SDRAngel 7.19.1 for Windows
HackRF One firmware 2024.02.1
Windows 10 v22H2 (OS Build 19045.4894)

Added Tx device HackRF One. Set frequency to 435 MHz. Set RF Amp checked.
Created a channel using the NFM Modulator. Pressed the microphone icon on. Pressed the speaker on to hear myself speak.
In Preferences Audio, selected audio input (Microphone Realtek High Definition Audio).
Pressed play.
Held my BaoFeng UV-9R walkie talkie near the standard foldable dipole that came with my HackRF, and can hear static on my walkie talkie. Talked into the microphone and heard nothing from the speaker or the walkie talkie.

C:\Derrick\AmateurRadio\hackrf-tools-windows>hackrf_info
hackrf_info version: git-17f3943
libhackrf version: git-17f3943 (0.9)
Found HackRF
Index: 0
Serial number: 0000000000000000f75461dc287c23c3
Board ID Number: 4 (HackRF One)
Firmware Version: 2024.02.1 (API:1.08)
Part ID Number: 0xa000cb3c 0x004f4f66
Hardware Revision: r9
Hardware appears to have been manufactured by Great Scott Gadgets.
Hardware supported by installed firmware:
HackRF One

SDRAngel screenshots attached.