Today, I am going to show you that how can we hear a voice from Raspberry Pi Zero. I need to write a theoric instruction about this topic because Pi Zero hasn't got an audio out jack on it. You may search it among popular forums then you will see some complex circuits to hear a voice also mentioned in Adafruit.
Note: I haven't got a Raspberry Pi Zero yet. Because there are no place for me to buy it. So, let's get started with my theory of hearing voice from Pi Zero
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Step 1: A Basic Step
You have got Raspberry Pi Zero, and a HDMI cable. Just plug both your television and your Pi Zero board with HDMI cable then plug in your headphone to the television.
When you run Pi Zero, go to it's default web browser, then open Youtube while you connected to internet, you may listen the sound of broadcasted video on Youtube.
Note: Instead of headphones you may use laudspeakers.
Step 2: A Moderate Step
On that step, you need to have mini HDMI to VGA converter with sound jack onboarded. Here is the product for example.
With this product, when you attached this converter to Pi Zero with HDMI converters(maybe) there will be a sound jack you'll see,
On that jack is letting you to hear voice from Raspberry Pi Zero for you.
Step 3: An Expensive Step
If you have amplifier such as this product, you may enter your Pi Zero board to this amplifier directly via HDMI cables with maybe using with HDMI converters to do that, the amplifier helps you to see Pi Zero Desktop and also you may hear a voice.
On the digital amplifier, you may see HDMI outputs on behind such as named as Blu-Ray, Game, DVD-Player e.t.c.
Run your Pi Zero, attach to the amplifier directly to one of the HDMI inputs, select this on the menu of amplifier then build your connections.
If you have surround system is attached to the amplifier, you may listen your Pi Zero with a pleasure.
That's all !
Step 4: BONUS: Reading This Instructable
NOTE: This instructable's step is aimed for visually impaired people to hear the sentences to learn what's going on here. Watch the video, it explains all steps.