在線上教授吉他課可以讓你接觸到更多學生，但要讓線上吉他課音訊設定順暢且專業，卻是一個挑戰。在這篇文章中，我將分享我目前的線上吉他課音訊設定流程，包含硬體、軟體以及在 Mac 上使用虛擬音訊路由的技巧。這個設定能確保我的吉他聲音、語音以及電腦伴奏帶聲音都能清楚傳達給學生，同時我也能透過耳機監聽所有聲音，並避免串音問題。讓我們開始打造你的線上吉他教學音訊吧！
設定概覽
我的設定目標是將三個聲音來源——吉他聲、語音（說話聲）、以及電腦的伴奏帶聲音（例如背景音樂或練習曲）——混音後傳送到 Microsoft Teams，讓學生能聽到完整的教學音訊。同時，我需要透過耳機監聽這些聲音，並直接聽到 Teams 中學生的聲音（而不將其混入送給學生的音訊中，以避免串音）。以下是我的設備和設定方式：
- 吉他：透過錄音介面連接到 Mac。
- 麥克風：使用 Mac 內建麥克風，錄製我的語音。
- 電腦伴奏帶：從 Mac 的音樂播放軟體（例如 iTunes 或 Spotify）播放，作為背景音樂或練習曲。
- 音訊路由：使用 BlackHole（虛擬音訊驅動程式）和 LadioCast（軟體混音器）來管理音訊，將吉他聲、語音和伴奏帶聲音混音後傳送到 Microsoft Teams。
- 監聽：透過有線耳機監聽混音後的音訊，並直接聽到 Teams 中學生的聲音（不經過 BlackHole 混音，以避免串音）。
- 耳機：透過 3.5mm 線連接到 Mac，用於監聽。
以下是我的硬體設定示意圖，方便大家理解：
步驟 1：硬體連接
首先，我將吉他連接到錄音介面，然後透過 USB 線將錄音介面連接到 Mac。錄音介面會將吉他的類比訊號轉換成數位訊號，讓 Mac 能處理。為了監聽，我使用有線耳機，透過 3.5mm 線連接到 Mac 的耳機孔，這樣可以即時聽到我的吉他聲音、語音、伴奏帶聲音，以及 Teams 中學生的聲音，幾乎沒有延遲。
步驟 2：使用 BlackHole 和 LadioCast 進行線上吉他課音訊路由
為了管理多個音訊來源，我使用了 BlackHole（虛擬音訊驅動程式）和 LadioCast（macOS 上的免費混音軟體）來混音和路由音訊。具體來說，我需要將吉他聲、語音和電腦伴奏帶聲音混音後送進 Microsoft Teams，但 Teams 的播放聲音（例如學生的聲音）不應該進入混音流程，以避免串音。
如何設定 BlackHole 進行音訊路由
我先在 Mac 上安裝了 BlackHole（包含 2ch 和 16ch 版本）。下載 BlackHole。BlackHole 就像一個虛擬音訊設備，可以讓我將音訊從一個應用程式路由到另一個應用程式。我將電腦伴奏帶的播放軟體（例如 iTunes 或 Spotify）的音訊輸出設為 BlackHole 2ch，這樣伴奏帶聲音會被路由到 BlackHole 2ch，然後進入 LadioCast 進行混音。需要注意的是，我並未將 Mac 的系統音訊輸出設為 BlackHole 2ch，因為這樣會導致 Teams 的播放聲音（例如學生的聲音）也進入混音流程，造成串音。相反，我在 Teams 的設定中將其播放聲音直接送到耳機（詳見步驟 3）。
如何設定 LadioCast 進行混音
接下來，我使用 LadioCast 來混音我的音訊來源。下載 LadioCast。以下是我的設定方式：
- 輸入 1 (BlackHole 2ch)：用來接收電腦伴奏帶聲音（例如 iTunes 或 Spotify 播放的背景音樂或練習曲）。
- 輸入 2 (TONEX One)：這是我的吉他訊號，從錄音介面輸入。
- 輸入 3 (內建麥克風)：用來接收我的語音。
- 主要輸出 (BlackHole 16ch)：這是混音後的音訊（包含吉他聲、語音和伴奏帶聲音），會傳送到 Microsoft Teams。
- 輔助輸出 1 (內建輸出)：將混音後的音訊（吉他聲、語音和伴奏帶聲音）傳送到我的耳機進行監聽。
我會調整每個輸入的音量，確保混音平衡。例如，我可能會稍微降低伴奏帶的音量，讓吉他和語音更突出。以下是我的 LadioCast 介面設定：
步驟 3：Microsoft Teams 音訊設定
最後，我在 Microsoft Teams 中設定音訊設備，以確保學生聽到混音後的音訊（吉他聲 + 語音 + 伴奏帶聲音），而我能直接聽到學生的聲音，避免串音：
- 音訊輸入：設為 BlackHole 16ch，這樣 Teams 會接收到 LadioCast 混音後的音訊（包含吉他聲、語音和伴奏帶聲音）。
- 音訊輸出：設為 內建輸出，這樣 Teams 的播放聲音（例如學生的聲音）會直接送到我的有線耳機進行監聽，而不會進入 BlackHole 混音流程。同時，我的耳機也會接收到 LadioCast 混音後的音訊（吉他聲、語音和伴奏帶聲音），讓我能完整監聽教學音訊和學生的聲音。
這樣的設定能確保學生透過 Teams 聽到混音後的音訊（吉他聲 + 語音 + 伴奏帶聲音），而我也能透過耳機聽到混音後的音訊以及學生的聲音，且學生的聲音不會被混入送給學生的音訊中，避免串音問題（即避免學生的聲音被混音後送回給學生，造成回音或混亂）。
以下是我的 Teams 音訊設定截圖：
為什麼這個線上吉他課音訊設定有效
這個設定讓我可以：
- 使用 LadioCast 即時混音吉他聲、語音和電腦伴奏帶聲音，並將其傳送到 Teams 給學生聽。
- 透過耳機監聽混音後的音訊（吉他聲、語音和伴奏帶聲音），並直接聽到 Teams 中學生的聲音，幾乎沒有延遲。
- 避免串音問題，確保學生的聲音不會被混入送給學生的音訊中。
這是一個輕量且經濟的解決方案，因為 BlackHole 和 LadioCast 都是免費工具。唯一的硬體投資是錄音介面，這對於將乾淨的吉他訊號輸入到 Mac 是必要的。
提升線上吉他課音訊體驗的小建議
- 測試音量：在開始課程前，先進行一次測試通話，確保吉他、語音和伴奏帶的音量平衡。
- 減少延遲：使用有線耳機和優質的錄音介面可以有效降低延遲，這對即時吉他課非常重要。
- 備用麥克風：如果內建麥克風的音質不夠好，可以考慮使用外接 USB 麥克風，提升語音清晰度。
結論
線上吉他課的音訊設定並不一定要很複雜。透過 BlackHole 和 LadioCast 這樣的工具，你可以用很低的成本打造一個專業的音訊流程，讓吉他聲、語音和伴奏帶聲音完美呈現給學生，同時避免串音問題。希望這篇指南能幫助你開始自己的線上課程！如果有任何問題，或是你有其他好用的設定，歡迎在下方留言分享！
祝教學/上課愉快！🎸
常見問題
線上吉他課音訊設定需要哪些設備？
你需要一把吉他、一個錄音介面、一台 Mac、BlackHole 和 LadioCast 軟體，以及一副有線耳機來完成線上吉他課音訊設定。
如何減少線上吉他課音訊的延遲？
使用有線耳機和優質的錄音介面可以有效減少線上吉他課音訊的延遲，這對即時教學非常重要。
如何避免串音問題？
在 Teams 中將音訊輸出設為內建輸出，確保學生的聲音直接送到你的耳機，而不進入 BlackHole 混音流程，這樣可以避免學生的聲音被混入送給學生的音訊中，造成回音或混亂。
Audio Setup for Online Guitar Lessons: A Step-by-Step Guide
Teaching guitar lessons online allows you to reach more students, but setting up a smooth and professional audio setup for online guitar lessons can be a challenge. In this article, I’ll share my current audio setup for online guitar lessons, including hardware, software, and techniques for virtual audio routing on a Mac. This setup ensures that my guitar sound, voice, and computer backing track audio are clearly delivered to students, while I can monitor everything through headphones and avoid crosstalk issues. Let’s get started with your online guitar lessons audio setup!
Setup Overview
My goal is to mix three audio sources—guitar sound, voice (speech), and computer backing track audio (e.g., background music or practice tracks)—and send them to Microsoft Teams for students to hear. At the same time, I need to monitor these sounds through headphones and directly hear the student’s voice from Teams (without mixing it into the audio sent to students, to avoid crosstalk). Here’s my equipment and setup:
- Guitar: Connected to the Mac via an audio interface.
- Microphone: Using the Mac’s built-in microphone to capture my voice.
- Computer Backing Track: Played from the Mac’s music playback software (e.g., iTunes or Spotify) as background music or practice tracks.
- Audio Routing: Using BlackHole (a virtual audio driver) and LadioCast (a software mixer) to manage audio, mixing the guitar, voice, and backing track audio before sending it to Microsoft Teams.
- Monitoring: Using wired headphones to monitor the mixed audio and directly hear the student’s voice from Teams (without mixing it into the audio sent to students, to avoid crosstalk).
- Headphones: Connected to the Mac via a 3.5mm cable for monitoring.
Here’s a diagram of my hardware setup for better understanding:
Step 1: Hardware Connections
First, I connect my guitar to an audio interface, which is then linked to the Mac via a USB cable. The audio interface converts the guitar’s analog signal into a digital signal for the Mac to process. For monitoring, I use wired headphones connected to the Mac’s headphone jack via a 3.5mm cable, allowing me to hear my guitar sound, voice, backing track audio, and the student’s voice from Teams in real-time with almost no latency.
Step 2: Audio Routing for Online Guitar Lessons with BlackHole and LadioCast
To manage multiple audio sources, I use BlackHole (a virtual audio driver) and LadioCast (a free mixing software for macOS) to mix and route audio. Specifically, I need to mix the guitar sound, voice, and computer backing track audio and send them to Microsoft Teams, while ensuring that Teams’ playback audio (e.g., the student’s voice) is not mixed in to avoid crosstalk.
How to Set Up BlackHole for Audio Routing
I first installed BlackHole on my Mac (including both 2ch and 16ch versions). Download BlackHole. BlackHole acts like a virtual audio device, allowing me to route audio from one application to another. I set the audio output of my music playback software (e.g., iTunes or Spotify) to BlackHole 2ch, so the backing track audio is routed to BlackHole 2ch and then sent to LadioCast for mixing. Note that I do not set the Mac’s system audio output to BlackHole 2ch, as this would route Teams’ playback audio (e.g., the student’s voice) into the mix, causing crosstalk. Instead, I configure Teams to send its playback audio directly to my headphones (see Step 3).
How to Set Up LadioCast for Mixing
Next, I use LadioCast to mix my audio sources. Download LadioCast. Here’s how I set it up:
- Input 1 (BlackHole 2ch): Receives the computer backing track audio (e.g., background music or practice tracks played from iTunes or Spotify).
- Input 2 (TONEX One): This is my guitar signal, coming from the audio interface.
- Input 3 (Built-in Microphone): Captures my voice.
- Main Output (BlackHole 16ch): The mixed audio (including guitar, voice, and backing track audio), sent to Microsoft Teams.
- Aux Output 1 (Built-in Output): Sends the mixed audio (guitar, voice, and backing track audio) to my headphones for monitoring.
I adjust the volume of each input to ensure a balanced mix. For example, I might lower the backing track audio slightly to make the guitar and voice stand out. Here’s my LadioCast interface setup:
Step 3: Microsoft Teams Audio Settings
Finally, I configure the audio devices in Microsoft Teams to ensure students hear the mixed audio (guitar + voice + backing track audio), while I can directly hear the student’s voice without crosstalk:
- Audio Input: Set to BlackHole 16ch, so Teams receives the mixed audio from LadioCast (including guitar, voice, and backing track audio).
- Audio Output: Set to Built-in Output, so Teams’ playback audio (e.g., the student’s voice) is sent directly to my wired headphones for monitoring, without being mixed into the BlackHole audio stream. At the same time, my headphones also receive the mixed audio (guitar, voice, and backing track audio) from LadioCast, allowing me to fully monitor both the teaching audio and the student’s voice.
This setup ensures that students hear the mixed audio (guitar + voice + backing track audio) through Teams, while I can hear the mixed audio and the student’s voice through my headphones, with the student’s voice not being mixed into the audio sent to them, avoiding crosstalk (i.e., the student’s voice being mixed and sent back to them, causing echo or confusion).
Here’s a screenshot of my Teams audio settings:
Why This Audio Setup for Online Guitar Lessons Works
This setup allows me to:
- Mix my guitar, voice, and computer backing track audio in real-time using LadioCast and send it to Teams for students to hear.
- Monitor the mixed audio (guitar, voice, and backing track audio) through headphones and directly hear the student’s voice from Teams, with almost no latency.
- Avoid crosstalk by ensuring the student’s voice is not mixed into the audio sent to them.
It’s a lightweight and cost-effective solution since BlackHole and LadioCast are free tools. The only hardware investment is the audio interface, which is essential for getting a clean guitar signal into the Mac.
Tips to Enhance Your Online Guitar Lessons Audio Experience
- Test Volume Levels: Before starting a lesson, do a test call to ensure the guitar, voice, and backing track volumes are balanced.
- Reduce Latency: Using wired headphones and a high-quality audio interface can effectively minimize latency, which is crucial for real-time guitar lessons.
- Backup Microphone: If the built-in microphone’s quality isn’t good enough, consider using an external USB microphone to improve voice clarity.
Conclusion
Setting up audio for online guitar lessons doesn’t have to be complicated. With tools like BlackHole and LadioCast, you can create a professional audio workflow at a low cost, delivering guitar, voice, and backing track audio to students while avoiding crosstalk. I hope this guide helps you get started with your own online lessons! If you have any questions or other useful setups to share, feel free to leave a comment below!
Happy teaching/learning! 🎸
Frequently Asked Questions
What equipment do I need for an online guitar lessons audio setup?
You’ll need a guitar, an audio interface, a Mac, BlackHole and LadioCast software, and a pair of wired headphones to complete your online guitar lessons audio setup.
How can I reduce latency in my online guitar lessons audio setup?
Using wired headphones and a high-quality audio interface can effectively reduce latency in your online guitar lessons audio setup, which is crucial for real-time teaching.
How can I avoid crosstalk in my audio setup?
In Teams, set the audio output to Built-in Output to ensure the student’s voice is sent directly to your headphones without being mixed into the BlackHole audio stream. This prevents the student’s voice from being mixed and sent back to them, causing echo or confusion.