config.example.rtlsdr.toml

# NovaSDR Configuration — RTL-SDR (curated)
# Device: RTL-SDR via rtl_sdr
# Capture format: u8 (8-bit unsigned IQ)
#
# Run example (WBFM @ 100.9 MHz, 2.048 Msps):
#   rtl_sdr -g 48 -f 100900000 -s 2048000 - | ./build/spectrumserver --config config.example.rtlsdr.toml
#
# Notes:
# - Conservative defaults chosen to start reliably on typical hardware.
# - Keep waterfall zstd + FLAC audio; these do not require extra codecs.
# - Avoid "opus" and "av1" unless NovaSDR was compiled with those codecs.
# - If CPU/memory is tight, reduce input.fft_size, then input.sps.

[server]
port = 9002
host = "0.0.0.0"
html_root = "frontend/dist/"
otherusers = 1
threads = 1

[websdr]
register_online = false
name = "NovaSDR (RTL-SDR)"
antenna = "Discone"
grid_locator = "JO62"
hostname = ""
operator = "ChangeThis"
email = "example@test.com"
callsign_lookup_url = "https://www.qrz.com/db/"
chat_enabled = true

[limits]
# Multi-user caps; adjust to your host capacity
audio = 100
waterfall = 200
events = 200

[input]
# Core parameters
sps = 2048000                 # 2.048 Msps
frequency = 100900000         # Center frequency (Hz)
signal = "iq"                 # RTL-SDR outputs IQ

# Performance and quality
fft_size = 131072             # Reduce if OOM or high CPU (e.g., 65536)
fft_threads = 1
brightness_offset = 0
audio_sps = 12000
waterfall_size = 1024
waterfall_compression = "zstd"  # Leave as "zstd" unless AV1 compiled
audio_compression = "flac"      # Leave as "flac" unless Opus compiled
accelerator = "none"            # "none" | "opencl" | "cuda" | "mkl" (only if compiled)
smeter_offset = 0

[input.driver]
name = "stdin"
format = "u8"                 # rtl_sdr outputs u8 IQ

[input.defaults]
frequency = 100900000
modulation = "WBFM"           # AM | SAM | FM | WBFM | USB | LSB