Local choral societies should either put their heads together or get them banged together. With a finite market in their joint interest-base, you would think the last thing these worthy groups need is a diary-clash - but this is what is happening on Saturday evening.
Birmingham Bach Choir offers an evening of Mozart, Verdi, Mendelssohn and Bach at the newly refurbished and revitalised Church of St Martin in the Bull Ring (7.30pm). Alexander Mason is the organist, and Paul Spicer conducts (details on 0121 236 5622).
At the same time, Birmingham Choral Union is performing in Edgbaston's gracious St Augustine's Church, just off the Hagley Road. Conductor Colin Baines' programme is a Central European one, with Kodaly's Missa Brevis and Dvorak's endearing Mass in D (7.30pm, details on 0121 360 7793).
Admittedly a little further afield, in Malvern Priory, another of Birmingham's major choirs is in performance at 7.30pm on Saturday. Birmingham Festival Choral Society presents a sequence of 20th-century English choral music in Anthony Bradbury's last concert as music director of this historic body (01684 892289).
Other delightful churches in our region host concerts on Sunday. After last year's delightful launch series, "Celebrating English Song" begins this year's season in the elegant and airy Georgian church at Tardebigge near Bromsgrove with a visit from mezzo-soprano Diana Moore and pianist Christopher Gould. Their programme is a generous one, but so is the interval provision of tea and homemade cakes (3pm, details on 01527 872422).
Not all that far away, St Nicholas' Church in Alcester is the venue for the last in this year's series of Concerts in Warwickshire Churches. The Consort of Seaverall Friends' programme includes two cantatas by Bach, Ich habe genug and Jesu, der du meine Seele (7.30pm, details on 01789 763182).
Still out and about, Longborough Festival Opera, nestling cosily in the Cotswolds between Moreton-in-Marsh and Stow-on-the-Wold, presents Mozart's The Magic Flute tomorrow and Saturday, with Puccini's La Boheme on Tuesday and Wednesday. The 6.30pm start for these performances leaves time for a lengthy supper interval, either with a Glyndebourne-style bring your own picnic or a pre-booked meal in the excellent restaurant (details on 01451 830292).
In Birmingham, the CBSO concludes its first instalment of the four year-long "IgorFest" with tonight's programme of Stravinsky's Hans Andersen-inspired Song of the Nightingale, the Movements for Piano and Orchestra (Nicolas Hodges the soloist) and the Tchaikovsky-derived The Fairy's Kiss. Hans Graf conducts, replacing the indisposed Oliver Knussen (7.30pm, details on 0121 780 3333).
And at the Hippodrome, Welsh National Opera concludes its weeklong residency with a rare chance tonight to hear Tchaikovsky's Iolanta (a tale of a blind princess). Tomorrow brings The Magic Flute (if you can't get to Longborough you can catch it here) and Saturday Verdi's Rigoletto. All events start at 7.15pm, with details on 0870 730 1234.
Finally, two absorbing programmes of contemporary orchestral music are on offer this weekend. Tomorrow night Birmingham Conservatoire's remarkable studentdriven Thallein Ensemble performs in the Recital Hall, with a programme including the world premiere of Aluna by Lamberto Coccioli. Rivka Golani is the viola soloist, and Lionel Friend conducts (6pm, details on 0121 236 5622).
On Sunday the immensely talented Daniele Rosina, a Conservatoire post-graduate conducting student and an acceptee for this year's Leeds Conductors Competition, conducts the Central England Ensemble at the CBSO Centre in Berkley Street in a programme featuring the world premiere of Stevie Smith: In Memoriamby the admired composer and violinist (often in the ranks of the CBSO) Ivor McGregor. Mussorgsky's Khovanschina Prelude and Tchaikovsky's marvellous Fifth Symphony frame the evening (7.30pm, details on 07734 256268).