Vocabulary – 5 ways to use the word ‘sound’ - Dr Jekyll and Mr Hyde part 1

The English word ‘sound’ has many meanings and uses. In this session, we bring you BBC Learning English's own version of the Dr Jekyll and Mr Hyde - and we've found many different ways to use the word ‘sound’ in it.
You’ll find exercises on our website:
And here is part 2, with 4 more expressions:
Transcript:
Jonny
Hello, I'm Jonny. Today's story is set in 19th century London and tells the story of a respectable gentleman who has a curious relationship with a violent and detestable man.
The story begins with a man called John Utterson – he's a lawyer – and he's trying to sound out a friend about an odd situation he's seen. He saw another man, called Mr Hyde, trampling on a young girl. He compensated the girl's family for this by paying them with a cheque but this was signed by another man called Dr Jekyll.
Strange. By the sound of it, Dr Jekyll's will has also been changed so Mr Hyde will inherit everything. John Utterson concludes that the evil Mr Hyde is blackmailing Dr Jekyll and goes to see Jekyll – but he sounds annoyed and doesn't want to discuss it.
Later on, a man's body is found and it's thought that Mr Hyde is the murderer. John helps the police by taking them to Mr Hyde's apartment where they find the murder weapon – a walking cane that John had given to Dr Jekyll as a gift. John doesn't like the sound of this and wants to find out more.
Then for a while, there's not a sight or sound of Mr Hyde but then one day, one of John's friends suddenly dies but before he does he gives John a letter saying it must not be opened until Dr Jekyll's death.
This is a bit of a mystery but I'll leave it there for now. Join me again soon to find out what happens next. Bye for now.