How to listen to conf calls?

Listen in chronological order.

You wouldn't read a history book by starting in the present.

I'd start in 2019 and work forwards.

Try finding the transcripts instead of the conference calls themselves - it will save you tonnes of time.

I start from what the company is going through now and then work backwards - that allows me to focus directly on key issues and debates. That's how I approach shorter term trades on which I can dedicate a fairly limited amount of time, so if you're focused LT best to start from the older earnings call transcripts.

All the comments make sense. 

I'm in a MMHF team so we are pretty much focused on the short term. 

I see benefits to both methods, that's why I'm asking. 

A) From older to newer allow me to detect potential changes in management narratives, base algorithm of the business and key events (M&A, Capital increase, management changes...).

B) From the newer to older allow me to directly identify the key debates/challenges and understand the momentum of the fundamentals. 

I start with the most recent transcript available and decide when / where to go backwards as needed. The most recent call is usually the freshest in terms of current setup - what analysts care about, what the company wants to discuss, etc. Listening or reading every call sounds like a monumental waste of time and is generally indicative of just lacking context / knowing what to look for.