Why does my coffee taste sour when I brew pour-over coffee?
There are several reasons why your pour-over coffee might taste sour:

1. **Under-extraction**: If you're not brewing your coffee for long enough or if the water temperature is too low, the coffee may be under-extracted, which can result in a sour taste. Try increasing the brewing time or using hotter water to see if that helps.

2. **High acidity in the beans**: Some coffee beans are naturally more acidic than others, and this can result in a sour taste. If you find that your coffee is consistently sour, you may want to try a different type of bean with lower acidity.

3. **Improper grind size**: If your coffee grounds are too coarse, the water will pass through too quickly and result in under-extraction. If the grounds are too fine, the water will pass through too slowly and result in over-extraction. Both of these scenarios can result in a sour taste. Make sure you're using the correct grind size for your brew method.

4. **Water quality**: The quality of your water can also affect the taste of your coffee. If your water is too hard or has a high mineral content, it can result in a sour taste. Using filtered or purified water may help.

5. **Brewing method**: The pour-over method requires a bit of skill to get right. If you're not using the correct technique, it can result in under- or over-extraction, which can cause a sour taste. Make sure you're using the correct pouring technique and brewing method for your equipment.

By adjusting these factors, you may be able to improve the taste of your pour-over coffee and reduce the sourness.
Thank you, that helped. Is there another method of brewing coffee, which in general results in a less sour taste?
Sure, there are ways to brew coffee that allow you to have great control over resulting brew, some of them include:

- Aeropress is a technique of brewing coffee using a device similar in function to a syringe with a filter on the other end. Coffee and water is put into the device and sealed with a plunger. Applying pressure to a plunger makes coffee flow from the other side of the device.

- Brewing with french press. In it, you put coffee and water in a special beaker and after letting coffee brew you use a plunger with a metal mesh to push coffee grains down.

- Coldbrew is another technique where you put coffee grains in a dish and then fill it with cold water. Then you need to let mixture sit for around 12 to 24 hours, after which you filter the coffee grains out.

I hope this list will help you find interesting ways to try coffee. Let me know if you need further assistance.