A little Python script to generate a loop of the Homebrew Channel theme. Uses standard libraries, so no need for installing any with `pip`.

hbc_theme_loop.py

#!/usr/bin/python3

"""
This is free and unencumbered software released into the public domain.

Anyone is free to copy, modify, publish, use, compile, sell, or
distribute this software, either in source code form or as a compiled
binary, for any purpose, commercial or non-commercial, and by any
means.

In jurisdictions that recognize copyright laws, the author or authors
of this software dedicate any and all copyright interest in the
software to the public domain. We make this dedication for the benefit
of the public at large and to the detriment of our heirs and
successors. We intend this dedication to be an overt act of
relinquishment in perpetuity of all present and future rights to this
software under copyright law.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

For more information, please refer to <https://unlicense.org>
"""

import urllib.request
import os.path
import wave

# constants
INTRO_PART = "wiibrew-banner-intro-part.wav"
LOOP_PART = "wiibrew-banner-loop-part.wav"

OUTPUT_FILE = "wiibrew-banner.wav"

LENGTH = 80 * 60 # 80 minutes * 60 seconds = 4800 seconds

# download the parts if they don't exist
if not os.path.exists(INTRO_PART):
    print("Intro part not found, downloading...")

    urllib.request.urlretrieve(
        "https://github.com/fail0verflow/hbc/raw/master/channel/banner/sound/wiibrew-banner-intro-part.wav",
        INTRO_PART
    )

    print("Intro part downloaded successfully!")

if not os.path.exists(LOOP_PART):
    print("Loop part not found, downloading...")

    urllib.request.urlretrieve(
        "https://github.com/fail0verflow/hbc/raw/master/channel/banner/sound/wiibrew-banner-loop-part.wav",
        LOOP_PART
    )

    print("Loop part downloaded successfully!")

# initialize WAV objects
intro = wave.open(INTRO_PART, "rb")
loop = wave.open(LOOP_PART, "rb")

theme = wave.open(OUTPUT_FILE, "wb")

# get frame amount for each part
intro_frame_amount = intro.getnframes()
loop_frame_amount = loop.getnframes()

# set audio parameters
theme.setnchannels(loop.getnchannels())
theme.setsampwidth(loop.getsampwidth())
theme.setframerate(loop.getframerate())

# write intro part
theme.writeframes(intro.readframes(intro_frame_amount))

# write loop part until the end
count = (LENGTH * theme.getframerate() - intro_frame_amount) // loop_frame_amount

for _ in range(count):
    theme.writeframes(loop.readframes(loop_frame_amount))
    loop.rewind()

# close files
intro.close()
loop.close()

theme.close()